23143681 has 16 divisors (see below), whose sum is σ = 27900288. Its totient is φ = 18937600.

The previous prime is 23143667. The next prime is 23143697. The reversal of 23143681 is 18634132.

It is not a de Polignac number, because 23143681 - 2²³ = 14755073 is a prime.

It is a super-2 number, since 2×23143681² = 1071259940459522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23143181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1611 + ... + 6991.

It is an arithmetic number, because the mean of its divisors is an integer number (1743768).

Almost surely, 2^23143681 is an apocalyptic number.

It is an amenable number.

23143681 is a deficient number, since it is larger than the sum of its proper divisors (4756607).

23143681 is a wasteful number, since it uses less digits than its factorization.

23143681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5432.

The product of its digits is 3456, while the sum is 28.

The square root of 23143681 is about 4810.7879811939. The cubic root of 23143681 is about 284.9776570152.

It can be divided in two parts, 2314 and 3681, that added together give a palindrome (5995).

The spelling of 23143681 in words is "twenty-three million, one hundred forty-three thousand, six hundred eighty-one".