23151915 has 24 divisors (see below), whose sum is σ = 41876640. Its totient is φ = 11810304.

The previous prime is 23151907. The next prime is 23151929. The reversal of 23151915 is 51915132.

It is not a de Polignac number, because 23151915 - 2³ = 23151907 is a prime.

It is a super-2 number, since 2×23151915² = 1072022336334450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10150 + ... + 12219.

It is an arithmetic number, because the mean of its divisors is an integer number (1744860).

Almost surely, 2^23151915 is an apocalyptic number.

23151915 is a deficient number, since it is larger than the sum of its proper divisors (18724725).

23151915 is a wasteful number, since it uses less digits than its factorization.

23151915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22403 (or 22400 counting only the distinct ones).

The product of its digits is 1350, while the sum is 27.

The square root of 23151915 is about 4811.6436900502. The cubic root of 23151915 is about 285.0114492169.

The spelling of 23151915 in words is "twenty-three million, one hundred fifty-one thousand, nine hundred fifteen".