Properties of the Number 15225

Fifteen Thousand Two Hundred Twenty-Five

Basics

Value: 15224 → 15225 → 15226

Parity: odd

Prime: No

Previous Prime: 15217

Next Prime: 15227

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 ² × 7 × 29

Divisors: 1, 3, 5, 7, 15, 21, 25, 29, 35, 75

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11101101111001

Octal: 35571

Duodecimal: 8989

Hexadecimal: 3b79

Square: 231800625

Square Root: 123.38962679253066

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

Centered octahedral numbers (crystal ball sequence for cubic lattice). A1845

a(n) = C(n,1) + C(n,2) + C(n,3), or n*(n² + 5)/6. A4006

a(n) = 3ⁿ reduced modulo 2ⁿ. A2380

Number of reduced words of length n in the Weyl group B₇. A161716

a(n) = (2·n-1)*(4·n-1). A33567

a(n) is the decimal concatenation of n and n². A53061

Lower level digraph derived from a voltage graph. A115055

Sum of all the parts in the partitions of n into 8 parts. A308989

Number of integer compositions of n where adjacent parts are indivisible (either way) and the last and first part are also indivisible (either way). A318727

Pseudoprimes to base 6, written in base 6. A262103