172530239 has 4 divisors (see below), whose sum is σ = 197177424. Its totient is φ = 147883056.

The previous prime is 172530217. The next prime is 172530247. The reversal of 172530239 is 932035271.

172530239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172530239 - 2²⁰ = 171481663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172530299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12323582 + ... + 12323595.

It is an arithmetic number, because the mean of its divisors is an integer number (49294356).

Almost surely, 2^172530239 is an apocalyptic number.

172530239 is a deficient number, since it is larger than the sum of its proper divisors (24647185).

172530239 is an equidigital number, since it uses as much as digits as its factorization.

172530239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24647184.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 172530239 is about 13135.0766651741. The cubic root of 172530239 is about 556.7006665661.

The spelling of 172530239 in words is "one hundred seventy-two million, five hundred thirty thousand, two hundred thirty-nine".