31813052 has 24 divisors (see below), whose sum is σ = 59122224. Its totient is φ = 14926592.

The previous prime is 31813039. The next prime is 31813057. The reversal of 31813052 is 25031813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31813057) 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, 39518 + ... + 40314.

It is an arithmetic number, because the mean of its divisors is an integer number (2463426).

Almost surely, 2^31813052 is an apocalyptic number.

It is an amenable number.

31813052 is a deficient number, since it is larger than the sum of its proper divisors (27309172).

31813052 is a wasteful number, since it uses less digits than its factorization.

31813052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405 (or 1403 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 31813052 is about 5640.3060200666. The cubic root of 31813052 is about 316.8607494755.

Adding to 31813052 its reverse (25031813), we get a palindrome (56844865).

The spelling of 31813052 in words is "thirty-one million, eight hundred thirteen thousand, fifty-two".