22156641 has 24 divisors (see below), whose sum is σ = 36283520. Its totient is φ = 12915936.

The previous prime is 22156637. The next prime is 22156649. The reversal of 22156641 is 14665122.

22156641 is a `hidden beast` number, since 2 + 2 + 15 + 6 + 641 = 666.

It is not a de Polignac number, because 22156641 - 2² = 22156637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22156649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2761 + ... + 7206.

Almost surely, 2^22156641 is an apocalyptic number.

It is an amenable number.

22156641 is a deficient number, since it is larger than the sum of its proper divisors (14126879).

22156641 is a wasteful number, since it uses less digits than its factorization.

22156641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005 (or 10002 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 22156641 is about 4707.0841292673. The cubic root of 22156641 is about 280.8673825313.

The spelling of 22156641 in words is "twenty-two million, one hundred fifty-six thousand, six hundred forty-one".