311332013 has 8 divisors (see below), whose sum is σ = 314608800. Its totient is φ = 308063088.

The previous prime is 311332009. The next prime is 311332019. The reversal of 311332013 is 310233113.

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 311332013 - 2² = 311332009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311331982 and 311332000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311332019) 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, 109670 + ... + 112472.

It is an arithmetic number, because the mean of its divisors is an integer number (39326100).

Almost surely, 2^311332013 is an apocalyptic number.

It is an amenable number.

311332013 is a deficient number, since it is larger than the sum of its proper divisors (3276787).

311332013 is a wasteful number, since it uses less digits than its factorization.

311332013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3931.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 311332013 is about 17644.6029425431. The cubic root of 311332013 is about 677.7579074639.

Adding to 311332013 its reverse (310233113), we get a palindrome (621565126).

The spelling of 311332013 in words is "three hundred eleven million, three hundred thirty-two thousand, thirteen".