172900231 has 4 divisors (see below), whose sum is σ = 197600272. Its totient is φ = 148200192.

The previous prime is 172900201. The next prime is 172900241. The reversal of 172900231 is 132009271.

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

It is not a de Polignac number, because 172900231 - 2⁵ = 172900199 is a prime.

It is a super-2 number, since 2×172900231² = 59788979759706722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172900196 and 172900205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172900201) 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, 12350010 + ... + 12350023.

It is an arithmetic number, because the mean of its divisors is an integer number (49400068).

Almost surely, 2^172900231 is an apocalyptic number.

172900231 is a deficient number, since it is larger than the sum of its proper divisors (24700041).

172900231 is an equidigital number, since it uses as much as digits as its factorization.

172900231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24700040.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 172900231 is about 13149.1532426997. The cubic root of 172900231 is about 557.0983316003.

The spelling of 172900231 in words is "one hundred seventy-two million, nine hundred thousand, two hundred thirty-one".