23215915 has 8 divisors (see below), whose sum is σ = 28507248. Its totient is φ = 18140640.

The previous prime is 23215903. The next prime is 23215943. The reversal of 23215915 is 51951232.

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

It is not a de Polignac number, because 23215915 - 2⁹ = 23215403 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53776 + ... + 54205.

It is an arithmetic number, because the mean of its divisors is an integer number (3563406).

Almost surely, 2^23215915 is an apocalyptic number.

23215915 is a deficient number, since it is larger than the sum of its proper divisors (5291333).

23215915 is a wasteful number, since it uses less digits than its factorization.

23215915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108029.

The product of its digits is 2700, while the sum is 28.

The square root of 23215915 is about 4818.2896342997. The cubic root of 23215915 is about 285.2738314085.

The spelling of 23215915 in words is "twenty-three million, two hundred fifteen thousand, nine hundred fifteen".