31942219072 has 56 divisors (see below), whose sum is σ = 65370838016. Its totient is φ = 15476686848.

The previous prime is 31942219063. The next prime is 31942219093. The reversal of 31942219072 is 27091224913.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303808 + ... + 395200.

Almost surely, 2^31942219072 is an apocalyptic number.

31942219072 is a gapful number since it is divisible by the number (32) 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 31942219072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32685419008).

31942219072 is an abundant number, since it is smaller than the sum of its proper divisors (33428618944).

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

31942219072 is a wasteful number, since it uses less digits than its factorization.

31942219072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91575 (or 91565 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 31942219072 in words is "thirty-one billion, nine hundred forty-two million, two hundred nineteen thousand, seventy-two".