22200985 has 4 divisors (see below), whose sum is σ = 26641188. Its totient is φ = 17760784.

The previous prime is 22200947. The next prime is 22201001. The reversal of 22200985 is 58900222.

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 8856576 + 13344409 = 2976^2 + 3653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22200985 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2220094 + ... + 2220103.

It is an arithmetic number, because the mean of its divisors is an integer number (6660297).

Almost surely, 2^22200985 is an apocalyptic number.

It is an amenable number.

22200985 is a deficient number, since it is larger than the sum of its proper divisors (4440203).

22200985 is an equidigital number, since it uses as much as digits as its factorization.

22200985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4440202.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 22200985 is about 4711.7921219001. The cubic root of 22200985 is about 281.0546323870.

The spelling of 22200985 in words is "twenty-two million, two hundred thousand, nine hundred eighty-five".