31131330104 has 32 divisors (see below), whose sum is σ = 70634112480. Its totient is φ = 12557174784.

The previous prime is 31131330077. The next prime is 31131330107. The reversal of 31131330104 is 40103313113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31131330107) 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 7 ways as a sum of consecutive naturals, for example, 16349537 + ... + 16351440.

It is an arithmetic number, because the mean of its divisors is an integer number (2207316015).

Almost surely, 2^31131330104 is an apocalyptic number.

31131330104 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31131330104 is an abundant number, since it is smaller than the sum of its proper divisors (39502782376).

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

31131330104 is a wasteful number, since it uses less digits than its factorization.

31131330104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32701007 (or 32701003 counting only the distinct ones).

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

Adding to 31131330104 its reverse (40103313113), we get a palindrome (71234643217).

The spelling of 31131330104 in words is "thirty-one billion, one hundred thirty-one million, three hundred thirty thousand, one hundred four".