31304164 has 12 divisors (see below), whose sum is σ = 55267884. Its totient is φ = 15513344.

The previous prime is 31304159. The next prime is 31304179. The reversal of 31304164 is 46140313.

It can be written as a sum of positive squares in 2 ways, for example, as 10510564 + 20793600 = 3242^2 + 4560^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34177 + ... + 35080.

It is an arithmetic number, because the mean of its divisors is an integer number (4605657).

Almost surely, 2^31304164 is an apocalyptic number.

It is an amenable number.

31304164 is a deficient number, since it is larger than the sum of its proper divisors (23963720).

31304164 is a wasteful number, since it uses less digits than its factorization.

31304164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69374 (or 69372 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 31304164 is about 5595.0124217914. The cubic root of 31304164 is about 315.1621370729.

Adding to 31304164 its reverse (46140313), we get a palindrome (77444477).

The spelling of 31304164 in words is "thirty-one million, three hundred four thousand, one hundred sixty-four".