31213080000 has 280 divisors, whose sum is σ = 114668106960. Its totient is φ = 8323200000.

The previous prime is 31213079981. The next prime is 31213080001. The reversal of 31213080000 is 8031213.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213080001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1065550 + ... + 1094450.

Almost surely, 2^31213080000 is an apocalyptic number.

31213080000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31213080000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57334053480).

31213080000 is an abundant number, since it is smaller than the sum of its proper divisors (83455026960).

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

31213080000 is an equidigital number, since it uses as much as digits as its factorization.

31213080000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28942 (or 28911 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The spelling of 31213080000 in words is "thirty-one billion, two hundred thirteen million, eighty thousand".