Properties of the Number 21922

Twenty-One Thousand Nine Hundred Twenty-Two

Basics

Value: 21921 → 21922 → 21923

Parity: even

Prime: No

Previous Prime: 21911

Next Prime: 21929

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 97 × 113

Divisors: 1, 2, 97, 113, 194, 226, 10961, 21922

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101010110100010

Octal: 52642

Duodecimal: 1082A

Hexadecimal: 55a2

Square: 480574084

Square Root: 148.06079832285116

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

Decimal expansion of (34947+21922·sqrt(2))/127². A159468

Numbers k such that 9·10^k + 4·R_k - 3 is prime, where R_k = 11...1 is the repunit (A002275) of length k. A103097

Number of partitions satisfying (cn(0,5) = 0 and cn(2,5) <= cn(1,5) and cn(3,5) <= cn(1,5) and cn(2,5) <= cn(4,5) and cn(3,5) <= cn(4,5)). A36806

Real part of upper left and lower right terms of [1,(1+I); 1,1]ⁿ * [1,0]. A138766

T(n,k)=Number of length n arrays of permutations of 0..n-1 with each element moved by -k to k places and every three consecutive elements having its maximum within 4 of its minimum. A263703

Nonnegative values·of solutions (x, y) to the Diophantine equation x² + (x+127)² = y². A129992

Positive numbers y such that y² is of the form x² + (x+127)² with integer x. A159466

Decimal expansion of (129+16·sqrt(2))/127. A159467

Let s(k) be the sum of the decimal digits of a number k. a(n) is the smallest k such that s(k)*(s(k)+n)=k, or 0 if no such k exists. A190216

Decimal expansion of 1/918. A21922