22355649 has 8 divisors (see below), whose sum is σ = 33119520. Its totient is φ = 14903748.

The previous prime is 22355639. The next prime is 22355653. The reversal of 22355649 is 94655322.

22355649 is a `hidden beast` number, since 2 + 2 + 3 + 5 + 5 + 649 = 666.

It is not a de Polignac number, because 22355649 - 2⁴ = 22355633 is a prime.

It is a super-2 number, since 2×22355649² = 999550084422402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22355639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413967 + ... + 414020.

It is an arithmetic number, because the mean of its divisors is an integer number (4139940).

Almost surely, 2^22355649 is an apocalyptic number.

It is an amenable number.

22355649 is a deficient number, since it is larger than the sum of its proper divisors (10763871).

22355649 is an equidigital number, since it uses as much as digits as its factorization.

22355649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827996 (or 827990 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 22355649 is about 4728.1760754016. The cubic root of 22355649 is about 281.7057818691.

The spelling of 22355649 in words is "twenty-two million, three hundred fifty-five thousand, six hundred forty-nine".