23124155 has 4 divisors (see below), whose sum is σ = 27748992. Its totient is φ = 18499320.

The previous prime is 23124151. The next prime is 23124163. The reversal of 23124155 is 55142132.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23124155 - 2² = 23124151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23124155.

It is not an unprimeable number, because it can be changed into a prime (23124151) 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 3 ways as a sum of consecutive naturals, for example, 2312411 + ... + 2312420.

It is an arithmetic number, because the mean of its divisors is an integer number (6937248).

Almost surely, 2^23124155 is an apocalyptic number.

23124155 is a deficient number, since it is larger than the sum of its proper divisors (4624837).

23124155 is an equidigital number, since it uses as much as digits as its factorization.

23124155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4624836.

The product of its digits is 1200, while the sum is 23.

The square root of 23124155 is about 4808.7581556988. The cubic root of 23124155 is about 284.8974905779.

Adding to 23124155 its reverse (55142132), we get a palindrome (78266287).

The spelling of 23124155 in words is "twenty-three million, one hundred twenty-four thousand, one hundred fifty-five".