31012004 has 24 divisors (see below), whose sum is σ = 56827008. Its totient is φ = 14780480.

The previous prime is 31012001. The next prime is 31012013. The reversal of 31012004 is 40021013.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31012001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47609 + ... + 48255.

It is an arithmetic number, because the mean of its divisors is an integer number (2367792).

Almost surely, 2^31012004 is an apocalyptic number.

It is an amenable number.

31012004 is a deficient number, since it is larger than the sum of its proper divisors (25815004).

31012004 is a wasteful number, since it uses less digits than its factorization.

31012004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195 (or 1193 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 31012004 is about 5568.8422495165. The cubic root of 31012004 is about 314.1786074618.

Adding to 31012004 its reverse (40021013), we get a palindrome (71033017).

Subtracting 31012004 from its reverse (40021013), we obtain a palindrome (9009009).

The spelling of 31012004 in words is "thirty-one million, twelve thousand, four".