Properties of the Number 55221

Fifty-Five Thousand Two Hundred Twenty-One

Basics

Value: 55220 → 55221 → 55222

Parity: odd

Prime: No

Previous Prime: 55219

Next Prime: 55229

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 79 × 233

Divisors: 1, 3, 79, 233, 237, 699, 18407, 55221

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 1101011110110101

Octal: 153665

Duodecimal: 27B59

Hexadecimal: d7b5

Square: 3049358841

Square Root: 234.9914892075881

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 k which divide the sum of the Fibonacci numbers F(1) through F(k) and such that k is not a multiple of 24. A124456

Odd integers m that divide the sum of the first m nonzero Fibonacci numbers. A331976

a(n) = 100·n² + 100·n + 21. A152161

Square root of π(A064523(n)). A115835

Number of integer partitions of n with unique co-mode 1. A364062

Number of non-constant integer partitions of n whose length and maximum both divide n. A326852

Number of odd-length integer partitions of n into parts that are alternately equal and strictly decreasing. A351593

Number of partitions p of n such that the sequence of level steps (when interpreted as ascents) and descents of p forms a Dyck path. A304777

Table read by antidiagonals: T(n,k) (n >= 3, k >= 1) is the number of vertices formed in a regular n-gon by straight line segments when connecting the n corner vertices to the points dividing the sides into k equal parts. A354544

T(2n+5,n), array T as in A055216. A55221