31440021000500 has 96 divisors (see below), whose sum is σ = 80388299916288. Its totient is φ = 10516522656000.

The previous prime is 31440021000499. The next prime is 31440021000529. The reversal of 31440021000500 is 500012004413.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109403612 + ... + 109690611.

It is an arithmetic number, because the mean of its divisors is an integer number (837378124128).

Almost surely, 2^{31440021000500} is an apocalyptic number.

It is an amenable number.

31440021000500 is an abundant number, since it is smaller than the sum of its proper divisors (48948278915788).

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

31440021000500 is a wasteful number, since it uses less digits than its factorization.

31440021000500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219094290 (or 219094278 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 31440021000500 its reverse (500012004413), we get a palindrome (31940033004913).

The spelling of 31440021000500 in words is "thirty-one trillion, four hundred forty billion, twenty-one million, five hundred", and thus it is an aban number.