Properties of the Number 31275

Thirty-One Thousand Two Hundred Seventy-Five

Basics

Value: 31274 → 31275 → 31276

Parity: odd

Prime: No

Previous Prime: 31271

Next Prime: 31277

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 ² × 139

Divisors: 1, 3, 5, 9, 15, 25, 45, 75, 139, 225

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 111101000101011

Octal: 75053

Duodecimal: 16123

Hexadecimal: 7a2b

Square: 978125625

Square Root: 176.84739183827395

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

Split positive integers into extending even groups and sum: 1+2, 3+4+5+6, 7+8+9+10+11+12, 13+14+15+16+17+18+19+20, ... A61317

Number of partitions of n²+n into parts not greater than n. A206227

a(n+1) = a(n)-th composite number, with a(1) = 11. A59407

Number of partitions of 7n into 7 parts. A256287

a(n) = (1/3)*A291232(n). A291265

Number of nX2 1..3 arrays containing at least one of each value, all equal values connected, and rows considered as a single number in nondecreasing order. A166776

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (-1, 0, 1), (0, -1, 0), (1, 1, -1), (1, 1, 1)}. A149779

Consider the number of lines in the Pratt certificate for the n-th prime (A037202). This sequence shows where 2n first occurs. A244624

Number of lines in Pratt certificate for n-th prime. A37202

a(n)=least k such that the base 5 representation of n begins at s(k), where s=A031269. A31275