311231013 has 16 divisors (see below), whose sum is σ = 432561600. Its totient is φ = 198861696.

The previous prime is 311231003. The next prime is 311231017. The reversal of 311231013 is 310132113.

It is not a de Polignac number, because 311231013 - 2⁵ = 311230981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311230983 and 311231001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311231017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13488 + ... + 28361.

It is an arithmetic number, because the mean of its divisors is an integer number (27035100).

Almost surely, 2^311231013 is an apocalyptic number.

It is an amenable number.

311231013 is a deficient number, since it is larger than the sum of its proper divisors (121330587).

311231013 is a wasteful number, since it uses less digits than its factorization.

311231013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41956.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 311231013 is about 17641.7406454125. The cubic root of 311231013 is about 677.6846084888.

Adding to 311231013 its reverse (310132113), we get a palindrome (621363126).

The spelling of 311231013 in words is "three hundred eleven million, two hundred thirty-one thousand, thirteen".