311323200131 has 4 divisors (see below), whose sum is σ = 316599864600. Its totient is φ = 306046535664.

The previous prime is 311323200121. The next prime is 311323200143. The reversal of 311323200131 is 131002323113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311323200131 is a prime.

It is a super-2 number, since 2×311323200131² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (311323200101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2638332146 + ... + 2638332263.

It is an arithmetic number, because the mean of its divisors is an integer number (79149966150).

Almost surely, 2^311323200131 is an apocalyptic number.

311323200131 is a deficient number, since it is larger than the sum of its proper divisors (5276664469).

311323200131 is an equidigital number, since it uses as much as digits as its factorization.

311323200131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5276664468.

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

Adding to 311323200131 its reverse (131002323113), we get a palindrome (442325523244).

The spelling of 311323200131 in words is "three hundred eleven billion, three hundred twenty-three million, two hundred thousand, one hundred thirty-one".