23151143 has 4 divisors (see below), whose sum is σ = 23171928. Its totient is φ = 23130360.

The previous prime is 23151109. The next prime is 23151181. The reversal of 23151143 is 34115132.

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 23151143 - 2⁸ = 23150887 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 (23151343) 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, 8621 + ... + 10982.

It is an arithmetic number, because the mean of its divisors is an integer number (5792982).

Almost surely, 2^23151143 is an apocalyptic number.

23151143 is a deficient number, since it is larger than the sum of its proper divisors (20785).

23151143 is a wasteful number, since it uses less digits than its factorization.

23151143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20784.

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

The square root of 23151143 is about 4811.5634673150. The cubic root of 23151143 is about 285.0082812819.

Adding to 23151143 its reverse (34115132), we get a palindrome (57266275).

The spelling of 23151143 in words is "twenty-three million, one hundred fifty-one thousand, one hundred forty-three".