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Properties of the Number 19715

Nineteen Thousand Seven Hundred Fifteen

Basics

Value: 19714 → 19715 → 19716

Parity: odd

Prime: No

Previous Prime: 19709

Next Prime: 19717

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 × 3943

Divisors: 1, 5, 3943, 19715

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100110100000011

Octal: 46403

Duodecimal: B4AB

Hexadecimal: 4d03

Square: 388681225

Square Root: 140.41011359585178

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

Numbers that are the sum of five fourth powers in three or more ways. A344243
Numbers that are the sum of five fourth powers in exactly three ways. A344244
a(n) is the number of different score sequences that are possible for strong tournaments on n vertices. A351822
G.f. A(x) satisfies: A(x) = 1 + x - x2 * A(x/(1 - x)) / (1 - x). A346078
One half of sixth (m=5) column of triangle A060921 (bisection of Fibonacci triangle, odd part). A61185
Molien series for certain 16-dimensional group of order 322560 arising from genus-2 weight enumerators of singly-even (but not necessarily self-dual or self-orthogonal) binary codes. A92351
E.g.f. satisfies A(x) = exp(x·A(x)) * cosh(x·A(x)). A201595
Rectangular array T(n,k) = number of nondecreasing sequences of n 1..k integers with no element dividing the sequence sum (for n, k >= 1), read by decreasing antidiagonals. A212868
Decimal expansion of sqrt(π)/13. A19715
Let abcd... be the decimal expansion of n. Number of iterations of the map n -> f(n) needed to reach a number < 10, where f(n) = ab + cd + ... which ends in an exponent or a base according as the number of digits is even or odd. A226135