231642173 has 4 divisors (see below), whose sum is σ = 264733920. Its totient is φ = 198550428.

The previous prime is 231642157. The next prime is 231642181. The reversal of 231642173 is 371246132.

It is a happy number.

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 231642173 - 2⁴ = 231642157 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 (231642143) 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, 16545863 + ... + 16545876.

It is an arithmetic number, because the mean of its divisors is an integer number (66183480).

Almost surely, 2^231642173 is an apocalyptic number.

It is an amenable number.

231642173 is a deficient number, since it is larger than the sum of its proper divisors (33091747).

231642173 is an equidigital number, since it uses as much as digits as its factorization.

231642173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33091746.

The product of its digits is 6048, while the sum is 29.

The square root of 231642173 is about 15219.7954322652. The cubic root of 231642173 is about 614.1472951376.

The spelling of 231642173 in words is "two hundred thirty-one million, six hundred forty-two thousand, one hundred seventy-three".