31131143304 has 32 divisors (see below), whose sum is σ = 77875499520. Its totient is φ = 10370695616.

The previous prime is 31131143249. The next prime is 31131143401. The reversal of 31131143304 is 40334113113.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 in 7 ways as a sum of consecutive naturals, for example, 356904 + ... + 435479.

It is an arithmetic number, because the mean of its divisors is an integer number (2433609360).

Almost surely, 2^31131143304 is an apocalyptic number.

It is an amenable number.

31131143304 is an abundant number, since it is smaller than the sum of its proper divisors (46744356216).

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

31131143304 is a wasteful number, since it uses less digits than its factorization.

31131143304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794029 (or 794025 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31131143304 its reverse (40334113113), we get a palindrome (71465256417).

The spelling of 31131143304 in words is "thirty-one billion, one hundred thirty-one million, one hundred forty-three thousand, three hundred four".