311317140 has 24 divisors (see below), whose sum is σ = 871688160. Its totient is φ = 83017888.

The previous prime is 311317129. The next prime is 311317157. The reversal of 311317140 is 41713113.

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, 2594250 + ... + 2594369.

It is an arithmetic number, because the mean of its divisors is an integer number (36320340).

Almost surely, 2^311317140 is an apocalyptic number.

311317140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

311317140 is an abundant number, since it is smaller than the sum of its proper divisors (560371020).

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

311317140 is a wasteful number, since it uses less digits than its factorization.

311317140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5188631 (or 5188629 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 311317140 is about 17644.1814771896. The cubic root of 311317140 is about 677.7471146409.

The spelling of 311317140 in words is "three hundred eleven million, three hundred seventeen thousand, one hundred forty".