22139655 has 32 divisors (see below), whose sum is σ = 37635840. Its totient is φ = 11082240.

The previous prime is 22139651. The next prime is 22139687. The reversal of 22139655 is 55693122.

It is not a de Polignac number, because 22139655 - 2² = 22139651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22139651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37039 + ... + 37631.

It is an arithmetic number, because the mean of its divisors is an integer number (1176120).

Almost surely, 2^22139655 is an apocalyptic number.

22139655 is a deficient number, since it is larger than the sum of its proper divisors (15496185).

22139655 is a wasteful number, since it uses less digits than its factorization.

22139655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751.

The product of its digits is 16200, while the sum is 33.

The square root of 22139655 is about 4705.2794816036. The cubic root of 22139655 is about 280.7955901654.

The spelling of 22139655 in words is "twenty-two million, one hundred thirty-nine thousand, six hundred fifty-five".