172331994 has 16 divisors (see below), whose sum is σ = 345790368. Its totient is φ = 57256272.

The previous prime is 172331993. The next prime is 172332011. The reversal of 172331994 is 499133271.

172331994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (172331993) 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, 44937 + ... + 48620.

It is an arithmetic number, because the mean of its divisors is an integer number (21611898).

Almost surely, 2^172331994 is an apocalyptic number.

172331994 is an abundant number, since it is smaller than the sum of its proper divisors (173458374).

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

172331994 is a wasteful number, since it uses less digits than its factorization.

172331994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93869.

The product of its digits is 40824, while the sum is 39.

The square root of 172331994 is about 13127.5280993796. The cubic root of 172331994 is about 556.4873601490.

The spelling of 172331994 in words is "one hundred seventy-two million, three hundred thirty-one thousand, nine hundred ninety-four".