311312131302 has 32 divisors (see below), whose sum is σ = 624600345600. Its totient is φ = 103441638240.

The previous prime is 311312131279. The next prime is 311312131303. The reversal of 311312131302 is 203131213113.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311312131303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4664427 + ... + 4730697.

It is an arithmetic number, because the mean of its divisors is an integer number (19518760800).

Almost surely, 2^311312131302 is an apocalyptic number.

311312131302 is an abundant number, since it is smaller than the sum of its proper divisors (313288214298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311312131302 is a wasteful number, since it uses less digits than its factorization.

311312131302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68748.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 311312131302 its reverse (203131213113), we get a palindrome (514443344415).

The spelling of 311312131302 in words is "three hundred eleven billion, three hundred twelve million, one hundred thirty-one thousand, three hundred two".