23423155 has 32 divisors (see below), whose sum is σ = 34007040. Its totient is φ = 15146880.

The previous prime is 23423137. The next prime is 23423159. The reversal of 23423155 is 55132432.

It is not a de Polignac number, because 23423155 - 2⁵ = 23423123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23423159) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 47460 + ... + 47950.

It is an arithmetic number, because the mean of its divisors is an integer number (1062720).

Almost surely, 2^23423155 is an apocalyptic number.

23423155 is a deficient number, since it is larger than the sum of its proper divisors (10583885).

23423155 is a wasteful number, since it uses less digits than its factorization.

23423155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579.

The product of its digits is 3600, while the sum is 25.

The square root of 23423155 is about 4839.7474107643. The cubic root of 23423155 is about 286.1201632086.

Adding to 23423155 its reverse (55132432), we get a palindrome (78555587).

The spelling of 23423155 in words is "twenty-three million, four hundred twenty-three thousand, one hundred fifty-five".