22199539 has 4 divisors (see below), whose sum is σ = 22237200. Its totient is φ = 22161880.

The previous prime is 22199509. The next prime is 22199561. The reversal of 22199539 is 93599122.

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

It is a cyclic number.

It is not a de Polignac number, because 22199539 - 2¹³ = 22191347 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22199509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17932 + ... + 19129.

It is an arithmetic number, because the mean of its divisors is an integer number (5559300).

Almost surely, 2^22199539 is an apocalyptic number.

22199539 is a deficient number, since it is larger than the sum of its proper divisors (37661).

22199539 is an equidigital number, since it uses as much as digits as its factorization.

22199539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37660.

The product of its digits is 43740, while the sum is 40.

The square root of 22199539 is about 4711.6386746014. The cubic root of 22199539 is about 281.0485303481.

The spelling of 22199539 in words is "twenty-two million, one hundred ninety-nine thousand, five hundred thirty-nine".