Properties of the Number 90515

Ninety Thousand Five Hundred Fifteen

Basics

Value: 90514 → 90515 → 90516

Parity: odd

Prime: No

Previous Prime: 90511

Next Prime: 90523

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 5 × 43 × 421

Divisors: 1, 5, 43, 215, 421, 2105, 18103, 90515

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110000110010011

Octal: 260623

Duodecimal: 4446B

Hexadecimal: 16193

Square: 8192965225

Square Root: 300.85710894044036

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 walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (0, 1, -1), (0, 1, 0), (0, 1, 1), (1, 0, 1)}. A151138

Square array read by falling antidiagonals of central polynomial coefficients: largest coefficient in expansion of (1 + x + x² + ... + x^n-1)^k = ((1-xⁿ)/(1-x))^k, i.e., the coefficient of x^floor(k*(n-1)/2) and of x^ceiling(k*(n-1)/2); also number of compositions of floor(k*(n+1)/2) into exactly k positive integers each no more than n. A77042

Irregular triangle of Catalan-based numbers, read by rows. A336110

Duplicate of A075309. A90515