31520225104 has 40 divisors (see below), whose sum is σ = 64297715040. Its totient is φ = 14927603328.

The previous prime is 31520225039. The next prime is 31520225131. The reversal of 31520225104 is 40152202513.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2388027 + ... + 2401189.

It is an arithmetic number, because the mean of its divisors is an integer number (1607442876).

Almost surely, 2^31520225104 is an apocalyptic number.

It is an amenable number.

31520225104 is an abundant number, since it is smaller than the sum of its proper divisors (32777489936).

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

31520225104 is a wasteful number, since it uses less digits than its factorization.

31520225104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21067 (or 21061 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 31520225104 its reverse (40152202513), we get a palindrome (71672427617).

The spelling of 31520225104 in words is "thirty-one billion, five hundred twenty million, two hundred twenty-five thousand, one hundred four".