Properties of the Number 25819

Twenty-Five Thousand Eight Hundred Nineteen

Basics

Value: 25818 → 25819 → 25820

Parity: odd

Prime: Yes

Previous Prime: 25801

Next Prime: 25841

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 25819

Divisors: 1, 25819

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110010011011011

Octal: 62333

Duodecimal: 12B37

Hexadecimal: 64db

Square: 666620761

Square Root: 160.682917573711

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

Primes p whose period of reciprocal equals (p-1)/13. A98680

Smallest number with shortest addition-multiplication chain of length n. A383001

Numbers whose square starts with 4 identical digits. A132391

Solution of the complementary equation a(n) = a(n-1) + a(n-2) + n·b(n-1), where a(0) = 1, a(1) = 2, b(0) = 3, b(1) = 4, and (a(n)) and (b(n)) are increasing complementary sequences. A296288

Primes p such that, if q is the next prime, p + q² is a prime times a power of 10. A352837

Consecutive states of the linear congruential pseudo-random number generator 20403·s mod 2¹⁵ when started at s=1. A384196

Expansion of the series e(-q), where the series e(q) is Morier-Genoud and Ovsienko's q-analog of Euler's number e. A392020

a(n) is the number of ways to partition a square n X n into five rectangles of different dimensions, without any straight cut spanning the entire square. A384208

Least prime q such that (q-p)/(r-q), where p<q<r are three consecutive primes, produces a new ratio <= 1, arranged by Farey fractions A038566/A038567. A279066

Numbers whose square starts with exactly 4 identical digits. A346940