31444164 has 36 divisors (see below), whose sum is σ = 83669040. Its totient is φ = 9929520.

The previous prime is 31444159. The next prime is 31444177. The reversal of 31444164 is 46144413.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22302 + ... + 23669.

It is an arithmetic number, because the mean of its divisors is an integer number (2324140).

Almost surely, 2^31444164 is an apocalyptic number.

It is an amenable number.

31444164 is an abundant number, since it is smaller than the sum of its proper divisors (52224876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31444164 is a wasteful number, since it uses less digits than its factorization.

31444164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46000 (or 45995 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 31444164 is about 5607.5096076601. The cubic root of 31444164 is about 315.6312662090.

Adding to 31444164 its reverse (46144413), we get a palindrome (77588577).

The spelling of 31444164 in words is "thirty-one million, four hundred forty-four thousand, one hundred sixty-four".