311664818 has 4 divisors (see below), whose sum is σ = 467497230. Its totient is φ = 155832408.

The previous prime is 311664811. The next prime is 311664833. The reversal of 311664818 is 818466113.

311664818 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 818466113 = 59 ⋅13872307.

It can be written as a sum of positive squares in only one way, i.e., 299393809 + 12271009 = 17303^2 + 3503^2 .

It is not an unprimeable number, because it can be changed into a prime (311664811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77916203 + ... + 77916206.

Almost surely, 2^311664818 is an apocalyptic number.

311664818 is a deficient number, since it is larger than the sum of its proper divisors (155832412).

311664818 is a wasteful number, since it uses less digits than its factorization.

311664818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155832411.

The product of its digits is 27648, while the sum is 38.

The square root of 311664818 is about 17654.0312110294. The cubic root of 311664818 is about 677.9993227225. Note that the first 3 decimals are identical.

The spelling of 311664818 in words is "three hundred eleven million, six hundred sixty-four thousand, eight hundred eighteen".