172253891 has 8 divisors (see below), whose sum is σ = 174873600. Its totient is φ = 169645320.

The previous prime is 172253857. The next prime is 172253909. The reversal of 172253891 is 198352271.

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

It is a cyclic number.

It is not a de Polignac number, because 172253891 - 2⁶ = 172253827 is a prime.

It is a super-3 number, since 3×172253891³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172253491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31520 + ... + 36578.

It is an arithmetic number, because the mean of its divisors is an integer number (21859200).

Almost surely, 2^172253891 is an apocalyptic number.

172253891 is a deficient number, since it is larger than the sum of its proper divisors (2619709).

172253891 is an equidigital number, since it uses as much as digits as its factorization.

172253891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5569.

The product of its digits is 30240, while the sum is 38.

The square root of 172253891 is about 13124.5529828638. The cubic root of 172253891 is about 556.4032784510.

The spelling of 172253891 in words is "one hundred seventy-two million, two hundred fifty-three thousand, eight hundred ninety-one".