22156659 has 40 divisors (see below), whose sum is σ = 39494400. Its totient is φ = 12103344.

The previous prime is 22156649. The next prime is 22156663. The reversal of 22156659 is 95665122.

It is not a de Polignac number, because 22156659 - 2⁷ = 22156531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22156619) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12192 + ... + 13890.

It is an arithmetic number, because the mean of its divisors is an integer number (987360).

Almost surely, 2^22156659 is an apocalyptic number.

22156659 is a deficient number, since it is larger than the sum of its proper divisors (17337741).

22156659 is a wasteful number, since it uses less digits than its factorization.

22156659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741 (or 1732 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 22156659 is about 4707.0860412786. The cubic root of 22156659 is about 280.8674585899.

The spelling of 22156659 in words is "twenty-two million, one hundred fifty-six thousand, six hundred fifty-nine".