313121228 has 12 divisors (see below), whose sum is σ = 626242512. Its totient is φ = 134194800.

The previous prime is 313121219. The next prime is 313121239. The reversal of 313121228 is 822121313.

It is a happy number.

313121228 is an admirable 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, 5591423 + ... + 5591478.

It is an arithmetic number, because the mean of its divisors is an integer number (52186876).

Almost surely, 2^313121228 is an apocalyptic number.

It is an amenable number.

313121228 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.

313121228 is a wasteful number, since it uses less digits than its factorization.

313121228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11182912 (or 11182910 counting only the distinct ones).

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

The square root of 313121228 is about 17695.2317871228. The cubic root of 313121228 is about 679.0537790988.

The spelling of 313121228 in words is "three hundred thirteen million, one hundred twenty-one thousand, two hundred twenty-eight".