31861664224 has 48 divisors (see below), whose sum is σ = 71108286480. Its totient is φ = 13931412480.

The previous prime is 31861664221. The next prime is 31861664269. The reversal of 31861664224 is 42246616813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31861664221) 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, 2007637 + ... + 2023444.

It is an arithmetic number, because the mean of its divisors is an integer number (1481422635).

Almost surely, 2^31861664224 is an apocalyptic number.

It is an amenable number.

31861664224 is an abundant number, since it is smaller than the sum of its proper divisors (39246622256).

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

31861664224 is a wasteful number, since it uses less digits than its factorization.

31861664224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031123 (or 4031115 counting only the distinct ones).

The product of its digits is 331776, while the sum is 43.

The spelling of 31861664224 in words is "thirty-one billion, eight hundred sixty-one million, six hundred sixty-four thousand, two hundred twenty-four".