22638143 has 4 divisors (see below), whose sum is σ = 24696168. Its totient is φ = 20580120.

The previous prime is 22638127. The next prime is 22638149. The reversal of 22638143 is 34183622.

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

It is not a de Polignac number, because 22638143 - 2⁴ = 22638127 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 (22638149) 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, 1028996 + ... + 1029017.

It is an arithmetic number, because the mean of its divisors is an integer number (6174042).

Almost surely, 2^22638143 is an apocalyptic number.

22638143 is a deficient number, since it is larger than the sum of its proper divisors (2058025).

22638143 is a wasteful number, since it uses less digits than its factorization.

22638143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058024.

The product of its digits is 6912, while the sum is 29.

The square root of 22638143 is about 4757.9557585165. The cubic root of 22638143 is about 282.8873970899.

The spelling of 22638143 in words is "twenty-two million, six hundred thirty-eight thousand, one hundred forty-three".