22135639 has 2 divisors, whose sum is σ = 22135640. Its totient is φ = 22135638.

The previous prime is 22135579. The next prime is 22135651. The reversal of 22135639 is 93653122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22135639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22135639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22135339) 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, 11067819 + 11067820.

It is an arithmetic number, because the mean of its divisors is an integer number (11067820).

Almost surely, 2^22135639 is an apocalyptic number.

22135639 is a deficient number, since it is larger than the sum of its proper divisors (1).

22135639 is an equidigital number, since it uses as much as digits as its factorization.

22135639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 31.

The square root of 22135639 is about 4704.8527075776. The cubic root of 22135639 is about 280.7786109294.

The spelling of 22135639 in words is "twenty-two million, one hundred thirty-five thousand, six hundred thirty-nine".