31227228 has 24 divisors (see below), whose sum is σ = 80959760. Its totient is φ = 10409040.

The previous prime is 31227197. The next prime is 31227233. The reversal of 31227228 is 82272213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 144463 + ... + 144678.

Almost surely, 2^31227228 is an apocalyptic number.

It is an amenable number.

31227228 is an abundant number, since it is smaller than the sum of its proper divisors (49732532).

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

31227228 is a wasteful number, since it uses less digits than its factorization.

31227228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289154 (or 289146 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 31227228 is about 5588.1327829607. The cubic root of 31227228 is about 314.9037347563.

The spelling of 31227228 in words is "thirty-one million, two hundred twenty-seven thousand, two hundred twenty-eight".