23415155 has 8 divisors (see below), whose sum is σ = 28559184. Its totient is φ = 18424800.

The previous prime is 23415149. The next prime is 23415167. The reversal of 23415155 is 55151432.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-23415155 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 38081 + ... + 38690.

It is an arithmetic number, because the mean of its divisors is an integer number (3569898).

Almost surely, 2^23415155 is an apocalyptic number.

23415155 is a deficient number, since it is larger than the sum of its proper divisors (5144029).

23415155 is an equidigital number, since it uses as much as digits as its factorization.

23415155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76837.

The product of its digits is 3000, while the sum is 26.

The square root of 23415155 is about 4838.9208507683. The cubic root of 23415155 is about 286.0875854460.

Adding to 23415155 its reverse (55151432), we get a palindrome (78566587).

The spelling of 23415155 in words is "twenty-three million, four hundred fifteen thousand, one hundred fifty-five".