31304252 has 12 divisors (see below), whose sum is σ = 62608560. Its totient is φ = 13416096.

The previous prime is 31304239. The next prime is 31304261. The reversal of 31304252 is 25240313.

It is a happy number.

31304252 is an admirable number.

It is a congruent number.

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, 558977 + ... + 559032.

It is an arithmetic number, because the mean of its divisors is an integer number (5217380).

Almost surely, 2^31304252 is an apocalyptic number.

It is an amenable number.

31304252 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.

31304252 is a wasteful number, since it uses less digits than its factorization.

31304252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118020 (or 1118018 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 31304252 is about 5595.0202859328. The cubic root of 31304252 is about 315.1624323929.

Adding to 31304252 its reverse (25240313), we get a palindrome (56544565).

The spelling of 31304252 in words is "thirty-one million, three hundred four thousand, two hundred fifty-two".