331253128 has 16 divisors (see below), whose sum is σ = 622327500. Its totient is φ = 165299136.

The previous prime is 331253113. The next prime is 331253149. The reversal of 331253128 is 821352133.

It can be written as a sum of positive squares in 2 ways, for example, as 320481604 + 10771524 = 17902^2 + 3282^2 .

It is a junction number, because it is equal to n+sod(n) for n = 331253096 and 331253105.

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, 36603 + ... + 44746.

Almost surely, 2^331253128 is an apocalyptic number.

It is an amenable number.

331253128 is a deficient number, since it is larger than the sum of its proper divisors (291074372).

331253128 is a wasteful number, since it uses less digits than its factorization.

331253128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81864 (or 81860 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 331253128 is about 18200.3606557672. The cubic root of 331253128 is about 691.9159297336.

The spelling of 331253128 in words is "three hundred thirty-one million, two hundred fifty-three thousand, one hundred twenty-eight".