Properties of the Number 90212

Ninety Thousand Two Hundred Twelve

Basics

Value: 90211 → 90212 → 90213

Parity: even

Prime: No

Previous Prime: 90203

Next Prime: 90217

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 19 × 1187

Divisors: 1, 2, 4, 19, 38, 76, 1187, 2374, 4748, 22553

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110000001100100

Octal: 260144

Duodecimal: 44258

Hexadecimal: 16064

Square: 8138204944

Square Root: 300.35312550396407

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 multiples of n which have only distinct and nonzero digits in base 10. A328287

Triangle T(m,n) = # { k | concat(mk,nk) has no digit twice or more }, m >= n >= 0. A328288

Alternating row sums of array A078741 ((3,3)-Stirling2). A90212

Square array read by descending antidiagonals (n >= 0, k >= 0): let b(n,k) = (n+k)!/((n+1)!*k!); then T(n,k) = b(n,k) if b(n,k) is an integer, and T(n,k) = floor(b(n,k)) + 1 otherwise. A322596