311853138 has 16 divisors (see below), whose sum is σ = 625497600. Its totient is φ = 103652496.

The previous prime is 311853133. The next prime is 311853163. The reversal of 311853138 is 831358113.

It is a junction number, because it is equal to n+sod(n) for n = 311853099 and 311853108.

It is not an unprimeable number, because it can be changed into a prime (311853133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72370 + ... + 76557.

It is an arithmetic number, because the mean of its divisors is an integer number (39093600).

Almost surely, 2^311853138 is an apocalyptic number.

311853138 is an abundant number, since it is smaller than the sum of its proper divisors (313644462).

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

311853138 is a wasteful number, since it uses less digits than its factorization.

311853138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149281.

The product of its digits is 8640, while the sum is 33.

The square root of 311853138 is about 17659.3640315839. The cubic root of 311853138 is about 678.1358530772.

The spelling of 311853138 in words is "three hundred eleven million, eight hundred fifty-three thousand, one hundred thirty-eight".