172425922521 has 8 divisors (see below), whose sum is σ = 229910723520. Its totient is φ = 114945868272.

The previous prime is 172425922489. The next prime is 172425922541. The reversal of 172425922521 is 125229524271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172425922521 - 2⁵ = 172425922489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172425922541) 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, 1101045 + ... + 1247858.

It is an arithmetic number, because the mean of its divisors is an integer number (28738840440).

Almost surely, 2^172425922521 is an apocalyptic number.

It is an amenable number.

172425922521 is a deficient number, since it is larger than the sum of its proper divisors (57484800999).

172425922521 is a wasteful number, since it uses less digits than its factorization.

172425922521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373375.

The product of its digits is 201600, while the sum is 42.

The spelling of 172425922521 in words is "one hundred seventy-two billion, four hundred twenty-five million, nine hundred twenty-two thousand, five hundred twenty-one".