22251609 has 12 divisors (see below), whose sum is σ = 32288256. Its totient is φ = 14766552.

The previous prime is 22251601. The next prime is 22251611. The reversal of 22251609 is 90615222.

22251609 is a `hidden beast` number, since 2 + 2 + 2 + 51 + 609 = 666.

It is not a de Polignac number, because 22251609 - 2³ = 22251601 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (22251601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3537 + ... + 7550.

It is an arithmetic number, because the mean of its divisors is an integer number (2690688).

Almost surely, 2^22251609 is an apocalyptic number.

It is an amenable number.

22251609 is a deficient number, since it is larger than the sum of its proper divisors (10036647).

22251609 is a wasteful number, since it uses less digits than its factorization.

22251609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11316 (or 11313 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 22251609 is about 4717.1611166039. The cubic root of 22251609 is about 281.2680960208.

The spelling of 22251609 in words is "twenty-two million, two hundred fifty-one thousand, six hundred nine".