172388325 has 24 divisors (see below), whose sum is σ = 294847200. Its totient is φ = 88768960.

The previous prime is 172388299. The next prime is 172388329. The reversal of 172388325 is 523883271.

It is not a de Polignac number, because 172388325 - 2¹⁶ = 172322789 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172388329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37455 + ... + 41804.

It is an arithmetic number, because the mean of its divisors is an integer number (12285300).

Almost surely, 2^172388325 is an apocalyptic number.

172388325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172388325 is a deficient number, since it is larger than the sum of its proper divisors (122458875).

172388325 is a wasteful number, since it uses less digits than its factorization.

172388325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79301 (or 79296 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 172388325 is about 13129.6734536697. The cubic root of 172388325 is about 556.5479874568.

The spelling of 172388325 in words is "one hundred seventy-two million, three hundred eighty-eight thousand, three hundred twenty-five".