31154228 has 12 divisors (see below), whose sum is σ = 62308512. Its totient is φ = 13351800.

The previous prime is 31154159. The next prime is 31154239. The reversal of 31154228 is 82245113.

31154228 is an admirable number.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 31154197 and 31154206.

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, 556298 + ... + 556353.

It is an arithmetic number, because the mean of its divisors is an integer number (5192376).

Almost surely, 2^31154228 is an apocalyptic number.

It is an amenable number.

31154228 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.

31154228 is a wasteful number, since it uses less digits than its factorization.

31154228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112662 (or 1112660 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 31154228 is about 5581.5972624330. The cubic root of 31154228 is about 314.6581594424.

The spelling of 31154228 in words is "thirty-one million, one hundred fifty-four thousand, two hundred twenty-eight".