22199545 has 4 divisors (see below), whose sum is σ = 26639460. Its totient is φ = 17759632.

The previous prime is 22199509. The next prime is 22199561. The reversal of 22199545 is 54599122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3606201 + 18593344 = 1899^2 + 4312^2 .

It is a cyclic number.

It is not a de Polignac number, because 22199545 - 2⁹ = 22199033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2219950 + ... + 2219959.

It is an arithmetic number, because the mean of its divisors is an integer number (6659865).

Almost surely, 2^22199545 is an apocalyptic number.

It is an amenable number.

22199545 is a deficient number, since it is larger than the sum of its proper divisors (4439915).

22199545 is an equidigital number, since it uses as much as digits as its factorization.

22199545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4439914.

The product of its digits is 32400, while the sum is 37.

The square root of 22199545 is about 4711.6393113225. The cubic root of 22199545 is about 281.0485556683.

The spelling of 22199545 in words is "twenty-two million, one hundred ninety-nine thousand, five hundred forty-five".