23115143 has 4 divisors (see below), whose sum is σ = 23297280. Its totient is φ = 22933008.

The previous prime is 23115139. The next prime is 23115149. The reversal of 23115143 is 34151132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23115143 - 2² = 23115139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23115149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90878 + ... + 91131.

It is an arithmetic number, because the mean of its divisors is an integer number (5824320).

Almost surely, 2^23115143 is an apocalyptic number.

23115143 is a deficient number, since it is larger than the sum of its proper divisors (182137).

23115143 is a wasteful number, since it uses less digits than its factorization.

23115143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182136.

The product of its digits is 360, while the sum is 20.

The square root of 23115143 is about 4807.8210241231. The cubic root of 23115143 is about 284.8604754626.

Adding to 23115143 its reverse (34151132), we get a palindrome (57266275).

The spelling of 23115143 in words is "twenty-three million, one hundred fifteen thousand, one hundred forty-three".