Properties of the Number 51515

Fifty-One Thousand Five Hundred Fifteen

Basics

Value: 51514 → 51515 → 51516

Parity: odd

Prime: No

Previous Prime: 51511

Next Prime: 51517

Digit Sum: 17

Digital Root: 8

Palindrome: Yes

Factorization: 5 × 10303

Divisors: 1, 5, 10303, 51515

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100100100111011

Octal: 144473

Duodecimal: 2598B

Hexadecimal: c93b

Square: 2653795225

Square Root: 226.96916090077085

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

Number of labeled chordal graphs (connected or not) on n nodes with no induced path P₄. A58864

Numbers that are palindromic and divisible by 5. A43040

a(n) = ∑_k=1..n (-1)^k-1 * binomial(floor(n/k)+4,5). A366723

Number of (n+3) X 8 0..2 matrices with each 4 X 4 subblock idempotent. A224725

Numbers n such that the sum of the digits of n^φ(n) is divisible by n. A109660

List of numbers k whose consecutive digits increase or decrease by d-1, where d is the number of digits in k. A292439

Number of elements in n-th string generated by a Kolakoski(5,1) rule starting with a(1)=1. A95342

a(n) is the number of ordered solutions (x,y,z) to x² + y² == z² mod n with 1 <= x,y,z <= n-1. A136679

(Terms in A014738)/4. A51515