31984372100 has 18 divisors (see below), whose sum is σ = 69406087674. Its totient is φ = 12793748800.

The previous prime is 31984372099. The next prime is 31984372103. The reversal of 31984372100 is 127348913.

It can be written as a sum of positive squares in 3 ways, for example, as 1320159556 + 30664212544 = 36334^2 + 175112^2 .

It is not an unprimeable number, because it can be changed into a prime (31984372103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 159921761 + ... + 159921960.

Almost surely, 2^31984372100 is an apocalyptic number.

It is an amenable number.

31984372100 is an abundant number, since it is smaller than the sum of its proper divisors (37421715574).

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

31984372100 is a wasteful number, since it uses less digits than its factorization.

31984372100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319843735 (or 319843728 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 31984372100 in words is "thirty-one billion, nine hundred eighty-four million, three hundred seventy-two thousand, one hundred".