31545320000 has 140 divisors (see below), whose sum is σ = 82341079920. Its totient is φ = 11953728000.

The previous prime is 31545319979. The next prime is 31545320033. The reversal of 31545320000 is 2354513.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 739247 + ... + 780753.

Almost surely, 2^31545320000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31545320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41170539960).

31545320000 is an abundant number, since it is smaller than the sum of its proper divisors (50795759920).

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

31545320000 is an equidigital number, since it uses as much as digits as its factorization.

31545320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41558 (or 41533 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

Adding to 31545320000 its reverse (2354513), we get a palindrome (31547674513).

The spelling of 31545320000 in words is "thirty-one billion, five hundred forty-five million, three hundred twenty thousand".