23153215 has 4 divisors (see below), whose sum is σ = 27783864. Its totient is φ = 18522568.

The previous prime is 23153197. The next prime is 23153293. The reversal of 23153215 is 51235132.

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

It is a cyclic number.

It is not a de Polignac number, because 23153215 - 2⁵ = 23153183 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 2315317 + ... + 2315326.

It is an arithmetic number, because the mean of its divisors is an integer number (6945966).

Almost surely, 2^23153215 is an apocalyptic number.

23153215 is a deficient number, since it is larger than the sum of its proper divisors (4630649).

23153215 is an equidigital number, since it uses as much as digits as its factorization.

23153215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4630648.

The product of its digits is 900, while the sum is 22.

The square root of 23153215 is about 4811.7787771260. The cubic root of 23153215 is about 285.0167836633.

Adding to 23153215 its reverse (51235132), we get a palindrome (74388347).

The spelling of 23153215 in words is "twenty-three million, one hundred fifty-three thousand, two hundred fifteen".