23987151 has 8 divisors (see below), whose sum is σ = 35536560. Its totient is φ = 15991416.

The previous prime is 23987129. The next prime is 23987167. The reversal of 23987151 is 15178932.

It is not a de Polignac number, because 23987151 - 2⁹ = 23986639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23987251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444180 + ... + 444233.

It is an arithmetic number, because the mean of its divisors is an integer number (4442070).

Almost surely, 2^23987151 is an apocalyptic number.

23987151 is a deficient number, since it is larger than the sum of its proper divisors (11549409).

23987151 is an equidigital number, since it uses as much as digits as its factorization.

23987151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888422 (or 888416 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 23987151 is about 4897.6679144262. The cubic root of 23987151 is about 288.3984285815.

The spelling of 23987151 in words is "twenty-three million, nine hundred eighty-seven thousand, one hundred fifty-one".