22139566 has 4 divisors (see below), whose sum is σ = 33209352. Its totient is φ = 11069782.

The previous prime is 22139563. The next prime is 22139567. The reversal of 22139566 is 66593122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22139561) 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 as a sum of consecutive naturals, namely, 5534890 + ... + 5534893.

It is an arithmetic number, because the mean of its divisors is an integer number (8302338).

Almost surely, 2^22139566 is an apocalyptic number.

22139566 is a deficient number, since it is larger than the sum of its proper divisors (11069786).

22139566 is a wasteful number, since it uses less digits than its factorization.

22139566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11069785.

The product of its digits is 19440, while the sum is 34.

The square root of 22139566 is about 4705.2700241325. The cubic root of 22139566 is about 280.7952139048.

The spelling of 22139566 in words is "twenty-two million, one hundred thirty-nine thousand, five hundred sixty-six".