311311302013 has 4 divisors (see below), whose sum is σ = 311316867580. Its totient is φ = 311305736448.

The previous prime is 311311301957. The next prime is 311311302017. The reversal of 311311302013 is 310203113113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310203113113 = 2459 ⋅126150107.

It can be written as a sum of positive squares in 2 ways, for example, as 60713945604 + 250597356409 = 246402^2 + 500597^2 .

It is a cyclic number.

It is not a de Polignac number, because 311311302013 - 2⁹ = 311311301501 is a prime.

It is a super-2 number, since 2×311311302013² (a number of 24 digits) 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 (311311302017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2698020 + ... + 2811037.

It is an arithmetic number, because the mean of its divisors is an integer number (77829216895).

Almost surely, 2^311311302013 is an apocalyptic number.

It is an amenable number.

311311302013 is a deficient number, since it is larger than the sum of its proper divisors (5565567).

311311302013 is an equidigital number, since it uses as much as digits as its factorization.

311311302013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5565566.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 311311302013 its reverse (310203113113), we get a palindrome (621514415126).

The spelling of 311311302013 in words is "three hundred eleven billion, three hundred eleven million, three hundred two thousand, thirteen".