Properties of the Number 31243

Thirty-One Thousand Two Hundred Forty-Three

Basics

Value: 31242 → 31243 → 31244

Parity: odd

Prime: No

Previous Prime: 31237

Next Prime: 31247

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 157 × 199

Divisors: 1, 157, 199, 31243

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111101000001011

Octal: 75013

Duodecimal: 160B7

Hexadecimal: 7a0b

Square: 976125049

Square Root: 176.75689519789603

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

Partial sums of A299281. A299282

Largest squarefree number k such that Q(sqrt(-k)) has class number n. A38552

n written in fractional base 5/3. A24633

Truncate Stirling's asymptotic series for 1! after n terms and round to the nearest integer. A362113

Denominators of continued fraction convergents to sqrt(234). A41437

Number of 2Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 3 or 4 neighboring 1s. A297750

a(n) is the number of sets modulo n which can be formed by a finite arithmetic sequence. A331503

Largest number k such that C(-k) is the cyclic group of order n, where C(D) is the class group of the quadratic field with discriminant D; or 0 if no such k exists. A357600

Length of n-th run of digit 1 in A031235. A31243