31013152 has 24 divisors (see below), whose sum is σ = 61455996. Its totient is φ = 15405312.

The previous prime is 31013137. The next prime is 31013153. The reversal of 31013152 is 25131013.

It can be written as a sum of positive squares in 2 ways, for example, as 25040016 + 5973136 = 5004^2 + 2444^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (31013153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1938 + ... + 8110.

Almost surely, 2^31013152 is an apocalyptic number.

31013152 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31013152 is a deficient number, since it is larger than the sum of its proper divisors (30442844).

31013152 is a wasteful number, since it uses less digits than its factorization.

31013152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6340 (or 6332 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 31013152 is about 5568.9453220516. The cubic root of 31013152 is about 314.1824841606.

Adding to 31013152 its reverse (25131013), we get a palindrome (56144165).

The spelling of 31013152 in words is "thirty-one million, thirteen thousand, one hundred fifty-two".