23121255 has 16 divisors (see below), whose sum is σ = 37087200. Its totient is φ = 12300288.

The previous prime is 23121247. The next prime is 23121281. The reversal of 23121255 is 55212132.

It is not a de Polignac number, because 23121255 - 2³ = 23121247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5019 + ... + 8451.

It is an arithmetic number, because the mean of its divisors is an integer number (2317950).

Almost surely, 2^23121255 is an apocalyptic number.

23121255 is a deficient number, since it is larger than the sum of its proper divisors (13965945).

23121255 is a wasteful number, since it uses less digits than its factorization.

23121255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3890.

The product of its digits is 600, while the sum is 21.

The square root of 23121255 is about 4808.4566130932. The cubic root of 23121255 is about 284.8855804164.

Adding to 23121255 its reverse (55212132), we get a palindrome (78333387).

It can be divided in two parts, 23 and 121255, that added together give a triangular number (121278 = T₄₉₂).

The spelling of 23121255 in words is "twenty-three million, one hundred twenty-one thousand, two hundred fifty-five".