31310132 has 12 divisors (see below), whose sum is σ = 62620320. Its totient is φ = 13418616.

The previous prime is 31310089. The next prime is 31310137. The reversal of 31310132 is 23101313.

31310132 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31310137) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 559082 + ... + 559137.

It is an arithmetic number, because the mean of its divisors is an integer number (5218360).

Almost surely, 2^31310132 is an apocalyptic number.

It is an amenable number.

31310132 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.

31310132 is a wasteful number, since it uses less digits than its factorization.

31310132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118230 (or 1118228 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 31310132 is about 5595.5457285237. The cubic root of 31310132 is about 315.1821638881.

Adding to 31310132 its reverse (23101313), we get a palindrome (54411445).

The spelling of 31310132 in words is "thirty-one million, three hundred ten thousand, one hundred thirty-two".