Properties of the Number 79221

Seventy-Nine Thousand Two Hundred Twenty-One

Basics

Value: 79220 → 79221 → 79222

Parity: odd

Prime: No

Previous Prime: 79201

Next Prime: 79229

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 26407

Divisors: 1, 3, 26407, 79221

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011010101110101

Octal: 232565

Duodecimal: 39A19

Hexadecimal: 13575

Square: 6275966841

Square Root: 281.4622532418868

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

Write 0, 1, ..., n in binary and add as if they were decimal numbers. A67894

T(n,k) = Number of (n+k-1) X (n+k-1) binary arrays with k 1s in every row and column with rows and columns in lexicographically nondecreasing order. A227061

Number of n X n binary matrices with exactly 3 ones in each row and column, and with rows and columns in lexicographically nondecreasing order. A229162

Triangle read by rows, T(n,m) = (1/n)*∑_i=1..n C(n,i-1)*C(n,i)*C(n,m+1-i), T(0,0)=0, m<2n. A296186

Triangle T(n,d) (listed row-wise: T(1,1)=1, T(2,1)=1, T(2,2)=1, T(3,1)=2, T(3,2)=0, T(3,3)=1, ...) giving the number of n-edge general plane trees with root degree d that are fixed by the five-fold application of Catalan Automorphisms A057511/A057512 (Deep rotation of general parenthesizations/plane trees). A79221