23921115 has 16 divisors (see below), whose sum is σ = 39164928. Its totient is φ = 12460896.

The previous prime is 23921113. The next prime is 23921123. The reversal of 23921115 is 51112932.

It is not a de Polignac number, because 23921115 - 2¹ = 23921113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23921113) 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 15 ways as a sum of consecutive naturals, for example, 17899 + ... + 19188.

It is an arithmetic number, because the mean of its divisors is an integer number (2447808).

Almost surely, 2^23921115 is an apocalyptic number.

23921115 is a deficient number, since it is larger than the sum of its proper divisors (15243813).

23921115 is a wasteful number, since it uses less digits than its factorization.

23921115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37138.

The product of its digits is 540, while the sum is 24.

The square root of 23921115 is about 4890.9216922785. The cubic root of 23921115 is about 288.1335342371.

The spelling of 23921115 in words is "twenty-three million, nine hundred twenty-one thousand, one hundred fifteen".