23555257 has 16 divisors (see below), whose sum is σ = 26947584. Its totient is φ = 20394000.

The previous prime is 23555237. The next prime is 23555263. The reversal of 23555257 is 75255532.

It is not a de Polignac number, because 23555257 - 2²³ = 15166649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23555237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22332 + ... + 23362.

It is an arithmetic number, because the mean of its divisors is an integer number (1684224).

Almost surely, 2^23555257 is an apocalyptic number.

It is an amenable number.

23555257 is a deficient number, since it is larger than the sum of its proper divisors (3392327).

23555257 is a wasteful number, since it uses less digits than its factorization.

23555257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140.

The product of its digits is 52500, while the sum is 34.

The square root of 23555257 is about 4853.3758354366. The cubic root of 23555257 is about 286.6570423726.

It can be divided in two parts, 2355525 and 7, that added together give a palindrome (2355532).

The spelling of 23555257 in words is "twenty-three million, five hundred fifty-five thousand, two hundred fifty-seven".