Properties of the Number 22515

Twenty-Two Thousand Five Hundred Fifteen

Basics

Value: 22514 → 22515 → 22516

Parity: odd

Prime: No

Previous Prime: 22511

Next Prime: 22531

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 19 × 79

Divisors: 1, 3, 5, 15, 19, 57, 79, 95, 237, 285

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101011111110011

Octal: 53763

Duodecimal: 11043

Hexadecimal: 57f3

Square: 506925225

Square Root: 150.0499916694433

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

a(n) = concatenation of n² and n. A55436

a(n) = 100·n² + n. A55438

Odd n such that 2*φ(n) < n, but there does not exist an even k < n with φ(k) = φ(n). A118700

Odd numbers n for which A318879(n) is not zero and A318879(n) divides A318878(n); odd numbers such that A326140(n) = A318879(n). A326141

Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 20. A31698

a(n) = 225·n² + 15. A158557

Numbers k such that k divides the number of overpartitions of k (A015128). A299961

Numbers whose sum of triangular divisors is also a divisor and greater than 1. A209311

Let b(1) = 3 and let b(n+1) be the least prime expressible as k*(b(n)-1)*b(n)-1; this sequence gives the values of k in order. A306601

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 1), (0, 1, 1), (1, -1, -1), (1, 1, -1)}. A148872