Properties of the Number 22155

Twenty-Two Thousand One Hundred Fifty-Five

Basics

Value: 22154 → 22155 → 22156

Parity: odd

Prime: No

Previous Prime: 22153

Next Prime: 22157

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 7 × 211

Divisors: 1, 3, 5, 7, 15, 21, 35, 105, 211, 633

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101011010001011

Octal: 53213

Duodecimal: 109A3

Hexadecimal: 568b

Square: 490844025

Square Root: 148.8455575420375

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

Doubly triangular numbers: a(n) = n*(n+1)*(n²+n+2)/8. A2817

a(n) = n*(n+1)*(n²+n+1)/2. A110450

a(n) = 3·n*(6·n + 1). A144314

Number of partitions of n into 10 unordered relatively prime parts. A23030

The limiting sequence [A259095(r(r+1)/2-s,r), s=0,1,2,...,r-1] for very large r. A5576

Numbers which are both lucky and triangular. A118565

Triangular numbers t which are average of two consecutive primes p and p+4. A129752

Triangular numbers that are the product of a triangular number and a prime number. A253651

Number of primitive (aperiodic) reversible string structures with n beads using a maximum of four different colors. A56333

Triangular numbers with sum of digits = 15. A68130