172404231 has 8 divisors (see below), whose sum is σ = 230106864. Its totient is φ = 114818880.

The previous prime is 172404229. The next prime is 172404241. The reversal of 172404231 is 132404271.

It is a happy number.

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

It is not a de Polignac number, because 172404231 - 2¹ = 172404229 is a prime.

It is a super-2 number, since 2×172404231² = 59446437733402722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172404241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25830 + ... + 31811.

It is an arithmetic number, because the mean of its divisors is an integer number (28763358).

Almost surely, 2^172404231 is an apocalyptic number.

172404231 is a deficient number, since it is larger than the sum of its proper divisors (57702633).

172404231 is an equidigital number, since it uses as much as digits as its factorization.

172404231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58641.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 172404231 is about 13130.2791668723. The cubic root of 172404231 is about 556.5651041999.

The spelling of 172404231 in words is "one hundred seventy-two million, four hundred four thousand, two hundred thirty-one".