311400231 has 32 divisors (see below), whose sum is σ = 439084800. Its totient is φ = 196035840.

The previous prime is 311400227. The next prime is 311400233. The reversal of 311400231 is 132004113.

It is not a de Polignac number, because 311400231 - 2² = 311400227 is a prime.

It is a super-2 number, since 2×311400231² = 193940207733706722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 311400231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311400233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1014180 + ... + 1014486.

It is an arithmetic number, because the mean of its divisors is an integer number (13721400).

Almost surely, 2^311400231 is an apocalyptic number.

311400231 is a deficient number, since it is larger than the sum of its proper divisors (127684569).

311400231 is a wasteful number, since it uses less digits than its factorization.

311400231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 311400231 is about 17646.5359490184. The cubic root of 311400231 is about 677.8074065093.

Adding to 311400231 its reverse (132004113), we get a palindrome (443404344).

The spelling of 311400231 in words is "three hundred eleven million, four hundred thousand, two hundred thirty-one".