31013312 has 28 divisors (see below), whose sum is σ = 67138296. Its totient is φ = 14096640.

The previous prime is 31013293. The next prime is 31013341. The reversal of 31013312 is 21331013.

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, 21323 + ... + 22730.

Almost surely, 2^31013312 is an apocalyptic number.

31013312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31013312 is an abundant number, since it is smaller than the sum of its proper divisors (36124984).

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

31013312 is a wasteful number, since it uses less digits than its factorization.

31013312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44076 (or 44066 counting only the distinct ones).

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

The square root of 31013312 is about 5568.9596874102. The cubic root of 31013312 is about 314.1830244594.

Adding to 31013312 its reverse (21331013), we get a palindrome (52344325).

The spelling of 31013312 in words is "thirty-one million, thirteen thousand, three hundred twelve".