311331013 has 16 divisors (see below), whose sum is σ = 393120000. Its totient is φ = 240235776.

The previous prime is 311331011. The next prime is 311331019. The reversal of 311331013 is 310133113.

It is a cyclic number.

It is not a de Polignac number, because 311331013 - 2¹ = 311331011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311331011) 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, 54138 + ... + 59611.

It is an arithmetic number, because the mean of its divisors is an integer number (24570000).

Almost surely, 2^311331013 is an apocalyptic number.

It is an amenable number.

311331013 is a deficient number, since it is larger than the sum of its proper divisors (81788987).

311331013 is a wasteful number, since it uses less digits than its factorization.

311331013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113796.

The product of its (nonzero) digits is 81, while the sum is 16.

The square root of 311331013 is about 17644.5746052434. The cubic root of 311331013 is about 677.7571818092.

Adding to 311331013 its reverse (310133113), we get a palindrome (621464126).

The spelling of 311331013 in words is "three hundred eleven million, three hundred thirty-one thousand, thirteen".