31113228 has 12 divisors (see below), whose sum is σ = 72597560. Its totient is φ = 10371072.

The previous prime is 31113223. The next prime is 31113253. The reversal of 31113228 is 82231113.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (31113221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1296373 + ... + 1296396.

Almost surely, 2^31113228 is an apocalyptic number.

It is an amenable number.

31113228 is an abundant number, since it is smaller than the sum of its proper divisors (41484332).

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

31113228 is a wasteful number, since it uses less digits than its factorization.

31113228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2592776 (or 2592774 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 31113228 is about 5577.9232694615. The cubic root of 31113228 is about 314.5200653121.

The spelling of 31113228 in words is "thirty-one million, one hundred thirteen thousand, two hundred twenty-eight".