23172553 has 8 divisors (see below), whose sum is σ = 23609600. Its totient is φ = 22738320.

The previous prime is 23172529. The next prime is 23172557. The reversal of 23172553 is 35527132.

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 23172553 - 2⁹ = 23172041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23172557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22888 + ... + 23878.

It is an arithmetic number, because the mean of its divisors is an integer number (2951200).

Almost surely, 2^23172553 is an apocalyptic number.

It is an amenable number.

23172553 is a deficient number, since it is larger than the sum of its proper divisors (437047).

23172553 is an equidigital number, since it uses as much as digits as its factorization.

23172553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407.

The product of its digits is 6300, while the sum is 28.

The square root of 23172553 is about 4813.7878017212. The cubic root of 23172553 is about 285.0961120387.

Adding to 23172553 its reverse (35527132), we get a palindrome (58699685).

The spelling of 23172553 in words is "twenty-three million, one hundred seventy-two thousand, five hundred fifty-three".