311871185134 has 4 divisors (see below), whose sum is σ = 467806777704. Its totient is φ = 155935592566.

The previous prime is 311871185107. The next prime is 311871185167. The reversal of 311871185134 is 431581178113.

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

It is a super-2 number, since 2×311871185134² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 77967796282 + ... + 77967796285.

It is an arithmetic number, because the mean of its divisors is an integer number (116951694426).

Almost surely, 2^311871185134 is an apocalyptic number.

311871185134 is a deficient number, since it is larger than the sum of its proper divisors (155935592570).

311871185134 is a wasteful number, since it uses less digits than its factorization.

311871185134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155935592569.

The product of its digits is 80640, while the sum is 43.

The spelling of 311871185134 in words is "three hundred eleven billion, eight hundred seventy-one million, one hundred eighty-five thousand, one hundred thirty-four".