311131842804 has 72 divisors (see below), whose sum is σ = 788048352000. Its totient is φ = 103502952000.

The previous prime is 311131842799. The next prime is 311131842811. The reversal of 311131842804 is 408248131113.

311131842804 is a `hidden beast` number, since 311 + 1 + 318 + 4 + 28 + 0 + 4 = 666.

It is a super-2 number, since 2×311131842804² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75680709 + ... + 75684819.

It is an arithmetic number, because the mean of its divisors is an integer number (10945116000).

Almost surely, 2^311131842804 is an apocalyptic number.

It is an amenable number.

311131842804 is an abundant number, since it is smaller than the sum of its proper divisors (476916509196).

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

311131842804 is a wasteful number, since it uses less digits than its factorization.

311131842804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7821 (or 7816 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

Adding to 311131842804 its reverse (408248131113), we get a palindrome (719379973917).

The spelling of 311131842804 in words is "three hundred eleven billion, one hundred thirty-one million, eight hundred forty-two thousand, eight hundred four".