164631 has 4 divisors (see below), whose sum is σ = 219512. Its totient is φ = 109752.

The previous prime is 164627. The next prime is 164653. The reversal of 164631 is 136461.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 164631 - 2² = 164627 is a prime.

It is a super-2 number, since 2×164631² = 54206732322, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164598 and 164607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27436 + ... + 27441.

It is an arithmetic number, because the mean of its divisors is an integer number (54878).

2¹⁶⁴⁶³¹ is an apocalyptic number.

164631 is a deficient number, since it is larger than the sum of its proper divisors (54881).

164631 is an equidigital number, since it uses as much as digits as its factorization.

164631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54880.

The product of its digits is 432, while the sum is 21.

The square root of 164631 is about 405.7474584024. The cubic root of 164631 is about 54.8071482674.

The spelling of 164631 in words is "one hundred sixty-four thousand, six hundred thirty-one".