311203312013 has 16 divisors (see below), whose sum is σ = 348416164800. Its totient is φ = 275565386880.

The previous prime is 311203312001. The next prime is 311203312033. The reversal of 311203312013 is 310213302113.

It is a cyclic number.

It is not a de Polignac number, because 311203312013 - 2¹⁴ = 311203295629 is a prime.

It is a super-2 number, since 2×311203312013² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311203312033) 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, 2128856 + ... + 2270337.

It is an arithmetic number, because the mean of its divisors is an integer number (21776010300).

Almost surely, 2^311203312013 is an apocalyptic number.

It is an amenable number.

311203312013 is a deficient number, since it is larger than the sum of its proper divisors (37212852787).

311203312013 is a wasteful number, since it uses less digits than its factorization.

311203312013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4399372.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 311203312013 its reverse (310213302113), we get a palindrome (621416614126).

The spelling of 311203312013 in words is "three hundred eleven billion, two hundred three million, three hundred twelve thousand, thirteen".