311999216 has 10 divisors (see below), whose sum is σ = 604498512. Its totient is φ = 155999600.

The previous prime is 311999183. The next prime is 311999231. The reversal of 311999216 is 612999113.

311999216 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×311999216² = 194687021569229312, which contains 22 as substring.

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, 9749960 + ... + 9749991.

Almost surely, 2^311999216 is an apocalyptic number.

It is an amenable number.

311999216 is a deficient number, since it is larger than the sum of its proper divisors (292499296).

311999216 is a wasteful number, since it uses less digits than its factorization.

311999216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19499959 (or 19499953 counting only the distinct ones).

The product of its digits is 26244, while the sum is 41.

The square root of 311999216 is about 17663.4995400119. The cubic root of 311999216 is about 678.2417205020.

The spelling of 311999216 in words is "three hundred eleven million, nine hundred ninety-nine thousand, two hundred sixteen".