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Properties of the Number 31897

Thirty-One Thousand Eight Hundred Ninety-Seven

Basics

Value: 31896 → 31897 → 31898

Parity: odd

Prime: No

Previous Prime: 31891

Next Prime: 31907

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 167 × 191

Divisors: 1, 167, 191, 31897

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111110010011001

Octal: 76231

Duodecimal: 16561

Hexadecimal: 7c99

Square: 1017418609

Square Root: 178.59731240978965

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Spt function: total number of smallest parts (counted with multiplicity) in all partitions of n. A92269
T(n,k)=Number of nX(k+1) 0..3 arrays with every row least squares fitting to a positive slope straight line and every column least squares fitting to a zero or positive slope straight line, with a single point array taken as having zero slope. A223751
T(n,k)=Number of (n+2)Xk 0..3 arrays with all rows having a nonnegative second derivative, and all and columns having a positive second derivative in a quadratic least squares fit, with one and two element arrays taken as having a zero second derivative. A223495
a(n) = index of second occurrence of A161926(n) in A114381. A161927
Fundamental discriminants of real quadratic number fields with class number 9. A218159
a(n) = position of the first occurrence of n in A245714. A245723
Number of (n+2)X1 0..3 arrays with all rows having a nonnegative second derivative, and all and columns having a positive second derivative in a quadratic least squares fit, with one and two element arrays taken as having a zero second derivative. A223492
Number of 1X(n+1) 0..3 arrays with every row least squares fitting to a positive slope straight line and every column least squares fitting to a zero or positive slope straight line, with a single point array taken as having zero slope. A223752
a(n) = A298825(n)/n. A298826
Lucky numbers with size of gaps equal to 14 (upper terms). A31897