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Properties of the Number 162

One Hundred Sixty-Two

Basics

Value: 161 → 162 → 163

Parity: even

Prime: No

Previous Prime: 157

Next Prime: 163

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 4

Divisors: 1, 2, 3, 6, 9, 18, 27, 54, 81, 162

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 10100010

Octal: 242

Duodecimal: 116

Hexadecimal: a2

Square: 26244

Square Root: 12.727922061357855

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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

The Doudna sequence: write n-1 in binary; power of prime(k) in a(n) is # of 1's that are followed by k-1 0's. A5940
Numbers k such that 8·10k - 49 is prime. A271269
Abundant numbers (sum of divisors of m exceeds 2m). A5101
3-smooth numbers: numbers of the form 2i*3j with i, j >= 0. A3586
a(n) = prime(n) - 1. A6093
Niven (or Harshad, or harshad) numbers: numbers that are divisible by the sum of their digits. A5349
a(n) = 3·n. A8585
Numbers all of whose prime divisors are consecutive primes starting at 2. A55932
Positive integers which are neither squarefree integers nor prime powers. A126706
Fibbinary numbers: if n = F(i1) + F(i2) + ... + F(ik) is the Zeckendorf representation of n (i.e., write n in Fibonacci number system) then a(n) = 2i1 - 2 + 2i2 - 2 + ... + 2ik - 2. Also numbers whose binary representation contains no two adjacent 1's. A3714

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