31020204 has 24 divisors (see below), whose sum is σ = 72829120. Its totient is φ = 10275984.

The previous prime is 31020191. The next prime is 31020221. The reversal of 31020204 is 40202013.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 31020204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5974 + ... + 9885.

Almost surely, 2^31020204 is an apocalyptic number.

It is an amenable number.

31020204 is an abundant number, since it is smaller than the sum of its proper divisors (41808916).

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

31020204 is a wasteful number, since it uses less digits than its factorization.

31020204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16029 (or 16027 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 31020204 is about 5569.5784400617. The cubic root of 31020204 is about 314.2062960685.

Adding to 31020204 its reverse (40202013), we get a palindrome (71222217).

The spelling of 31020204 in words is "thirty-one million, twenty thousand, two hundred four".