311320231 has 8 divisors (see below), whose sum is σ = 314131104. Its totient is φ = 308520960.

The previous prime is 311320213. The next prime is 311320313. The reversal of 311320231 is 132023113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 311320231 - 2⁷ = 311320103 is a prime.

It is a super-2 number, since 2×311320231² = 193840572459786722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311320531) 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, 56311 + ... + 61591.

It is an arithmetic number, because the mean of its divisors is an integer number (39266388).

Almost surely, 2^311320231 is an apocalyptic number.

311320231 is a deficient number, since it is larger than the sum of its proper divisors (2810873).

311320231 is a wasteful number, since it uses less digits than its factorization.

311320231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5801.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 311320231 is about 17644.2690695874. The cubic root of 311320231 is about 677.7493577013.

Adding to 311320231 its reverse (132023113), we get a palindrome (443343344).

The spelling of 311320231 in words is "three hundred eleven million, three hundred twenty thousand, two hundred thirty-one".