31315004 has 12 divisors (see below), whose sum is σ = 62630064. Its totient is φ = 13420704.

The previous prime is 31314989. The next prime is 31315007. The reversal of 31315004 is 40051313.

31315004 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31315007) 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, 559169 + ... + 559224.

It is an arithmetic number, because the mean of its divisors is an integer number (5219172).

Almost surely, 2^31315004 is an apocalyptic number.

It is an amenable number.

31315004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31315004 is a wasteful number, since it uses less digits than its factorization.

31315004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118404 (or 1118402 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 31315004 is about 5595.9810578664. The cubic root of 31315004 is about 315.1985109698.

Adding to 31315004 its reverse (40051313), we get a palindrome (71366317).

The spelling of 31315004 in words is "thirty-one million, three hundred fifteen thousand, four".