313212128 has 12 divisors (see below), whose sum is σ = 616636440. Its totient is φ = 156606048.

The previous prime is 313212077. The next prime is 313212227. The reversal of 313212128 is 821212313.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4893908 + ... + 4893971.

It is an arithmetic number, because the mean of its divisors is an integer number (51386370).

Almost surely, 2^313212128 is an apocalyptic number.

It is an amenable number.

313212128 is a deficient number, since it is larger than the sum of its proper divisors (303424312).

313212128 is an equidigital number, since it uses as much as digits as its factorization.

313212128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9787889 (or 9787881 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 313212128 is about 17697.8000892766. The cubic root of 313212128 is about 679.1194831679.

The spelling of 313212128 in words is "three hundred thirteen million, two hundred twelve thousand, one hundred twenty-eight".