22639143 has 4 divisors (see below), whose sum is σ = 30185528. Its totient is φ = 15092760.

The previous prime is 22639139. The next prime is 22639157. The reversal of 22639143 is 34193622.

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

It is not a de Polignac number, because 22639143 - 2² = 22639139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22639143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22639103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3773188 + ... + 3773193.

It is an arithmetic number, because the mean of its divisors is an integer number (7546382).

Almost surely, 2^22639143 is an apocalyptic number.

22639143 is a deficient number, since it is larger than the sum of its proper divisors (7546385).

22639143 is an equidigital number, since it uses as much as digits as its factorization.

22639143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7546384.

The product of its digits is 7776, while the sum is 30.

The square root of 22639143 is about 4758.0608445038. The cubic root of 22639143 is about 282.8915623790.

The spelling of 22639143 in words is "twenty-two million, six hundred thirty-nine thousand, one hundred forty-three".