31542167216 has 80 divisors (see below), whose sum is σ = 73635168000. Its totient is φ = 12786418944.

The previous prime is 31542167203. The next prime is 31542167219. The reversal of 31542167216 is 61276124513.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 31542167216.

It is not an unprimeable number, because it can be changed into a prime (31542167219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1378235 + ... + 1400933.

It is an arithmetic number, because the mean of its divisors is an integer number (920439600).

Almost surely, 2^31542167216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31542167216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36817584000).

31542167216 is an abundant number, since it is smaller than the sum of its proper divisors (42093000784).

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

31542167216 is a wasteful number, since it uses less digits than its factorization.

31542167216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23386 (or 23380 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The spelling of 31542167216 in words is "thirty-one billion, five hundred forty-two million, one hundred sixty-seven thousand, two hundred sixteen".