23981115 has 24 divisors (see below), whose sum is σ = 39759408. Its totient is φ = 12342400.

The previous prime is 23981099. The next prime is 23981117. The reversal of 23981115 is 51118932.

It is not a de Polignac number, because 23981115 - 2⁴ = 23981099 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (23981117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11665 + ... + 13565.

It is an arithmetic number, because the mean of its divisors is an integer number (1656642).

Almost surely, 2^23981115 is an apocalyptic number.

23981115 is a deficient number, since it is larger than the sum of its proper divisors (15778293).

23981115 is a wasteful number, since it uses less digits than its factorization.

23981115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967 (or 1938 counting only the distinct ones).

The product of its digits is 2160, while the sum is 30.

The square root of 23981115 is about 4897.0516640117. The cubic root of 23981115 is about 288.3742361996.

The spelling of 23981115 in words is "twenty-three million, nine hundred eighty-one thousand, one hundred fifteen".