22215639 has 8 divisors (see below), whose sum is σ = 30179952. Its totient is φ = 14530880.

The previous prime is 22215629. The next prime is 22215667. The reversal of 22215639 is 93651222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22215639 - 2⁵ = 22215607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22215629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69702 + ... + 70019.

It is an arithmetic number, because the mean of its divisors is an integer number (3772494).

Almost surely, 2^22215639 is an apocalyptic number.

22215639 is a deficient number, since it is larger than the sum of its proper divisors (7964313).

22215639 is a wasteful number, since it uses less digits than its factorization.

22215639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139777.

The product of its digits is 6480, while the sum is 30.

The square root of 22215639 is about 4713.3469000276. The cubic root of 22215639 is about 281.1164565020.

The spelling of 22215639 in words is "twenty-two million, two hundred fifteen thousand, six hundred thirty-nine".