Properties of the Number 21930

Twenty-One Thousand Nine Hundred Thirty

Basics

Value: 21929 → 21930 → 21931

Parity: even

Prime: No

Previous Prime: 21929

Next Prime: 21937

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 5 × 17 × 43

Divisors: 1, 2, 3, 5, 6, 10, 15, 17, 30, 34

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101010110101010

Octal: 52652

Duodecimal: 10836

Hexadecimal: 55aa

Square: 480924900

Square Root: 148.08781178746617

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

List of codewords in binary lexicode with Hamming distance 8 written as decimal numbers. A75940

Smallest ∏_i:λ prime(i) for any complete partition λ of n. A259941

Sum over all partitions of n of the bitwise OR of the parts. A306902

Rows of binary Walsh matrices interpreted as reverse binary numbers. A228539

Heinz number of the multiset of differences between consecutive divisors of n. A328023

T(n, k) = S(2·n + 1, n, k + 1) for 0<=k<=n and n >= 0, array S as in A050157. A50158

Integers k such that ω(k) = ω(k-1) + ω(k-2) + ω(k-3), where ω(n) is the number of distinct prime factors of n. A76252

Wiener index of the n-sunlet graph. A180574

Coefficient of·in the reduction by x²->x+2 of the polynomial p(n,x)=1+xⁿ+x²ⁿ. A192466

Number of oriented rational links with crossing number n. A329908