31012228 has 24 divisors (see below), whose sum is σ = 59111640. Its totient is φ = 14150400.

The previous prime is 31012213. The next prime is 31012231. The reversal of 31012228 is 82221013.

It can be written as a sum of positive squares in 4 ways, for example, as 9604 + 31002624 = 98^2 + 5568^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1278 + ... + 7978.

It is an arithmetic number, because the mean of its divisors is an integer number (2462985).

Almost surely, 2^31012228 is an apocalyptic number.

It is an amenable number.

31012228 is a deficient number, since it is larger than the sum of its proper divisors (28099412).

31012228 is a wasteful number, since it uses less digits than its factorization.

31012228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6807 (or 6805 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 31012228 is about 5568.8623613805. The cubic root of 31012228 is about 314.1793638983.

It can be divided in two parts, 3101 and 2228, that added together give a square (5329 = 73²).

The spelling of 31012228 in words is "thirty-one million, twelve thousand, two hundred twenty-eight".