31522914372 has 24 divisors (see below), whose sum is σ = 74204385696. Its totient is φ = 10414649728.

The previous prime is 31522914347. The next prime is 31522914373. The reversal of 31522914372 is 27341922513.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31522914372.

It is not an unprimeable number, because it can be changed into a prime (31522914373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11622138 + ... + 11624849.

It is an arithmetic number, because the mean of its divisors is an integer number (3091849404).

Almost surely, 2^31522914372 is an apocalyptic number.

It is an amenable number.

31522914372 is an abundant number, since it is smaller than the sum of its proper divisors (42681471324).

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

31522914372 is a wasteful number, since it uses less digits than its factorization.

31522914372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23247107 (or 23247105 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The spelling of 31522914372 in words is "thirty-one billion, five hundred twenty-two million, nine hundred fourteen thousand, three hundred seventy-two".