172024161 has 4 divisors (see below), whose sum is σ = 229365552. Its totient is φ = 114682772.

The previous prime is 172024147. The next prime is 172024189. The reversal of 172024161 is 161420271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 172024161 - 2⁵ = 172024129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172024121) 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, 28670691 + ... + 28670696.

It is an arithmetic number, because the mean of its divisors is an integer number (57341388).

Almost surely, 2^172024161 is an apocalyptic number.

It is an amenable number.

172024161 is a deficient number, since it is larger than the sum of its proper divisors (57341391).

172024161 is an equidigital number, since it uses as much as digits as its factorization.

172024161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57341390.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 172024161 is about 13115.7981457477. The cubic root of 172024161 is about 556.1558154553.

The spelling of 172024161 in words is "one hundred seventy-two million, twenty-four thousand, one hundred sixty-one".