Properties of the Number 22521

Twenty-Two Thousand Five Hundred Twenty-One

Basics

Value: 22520 → 22521 → 22522

Parity: odd

Prime: No

Previous Prime: 22511

Next Prime: 22531

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 7507

Divisors: 1, 3, 7507, 22521

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 101011111111001

Octal: 53771

Duodecimal: 11049

Hexadecimal: 57f9

Square: 507195441

Square Root: 150.06998367428446

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

Integer part of Gauss's Arithmetic-Geometric Mean M(1,n⁴). A127760

Numbers n such that the decimal number concat(6,n) is a square. A273361

Integers that reach the (47360, 29127) cycle described in A234534, after iterations of numerator(σ(n)/n) = A017665(n). A249614

Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 100. A31598

Numerator of the generalized harmonic number H(n,5,1). A75137

Expansion of ∏_n>=1 (1 - x^7·n)⁷/(1 - xⁿ)⁸ in powers of x. A277958

Numbers k such that k and k+2 are both A000120-perfect numbers (A175522). A360639

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 86 ones. A31854

Number of (n+1) X (7+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction. A250655

Number of (n+2) X (7+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 1 3 6 or 7. A252304