209990224 has 10 divisors (see below), whose sum is σ = 406856090. Its totient is φ = 104995104.

The previous prime is 209990213. The next prime is 209990237. The reversal of 209990224 is 422099902.

It can be written as a sum of positive squares in only one way, i.e., 162103824 + 47886400 = 12732^2 + 6920^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6562179 + ... + 6562210.

It is an arithmetic number, because the mean of its divisors is an integer number (40685609).

Almost surely, 2^209990224 is an apocalyptic number.

It is an amenable number.

209990224 is a deficient number, since it is larger than the sum of its proper divisors (196865866).

209990224 is a wasteful number, since it uses less digits than its factorization.

209990224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13124397 (or 13124391 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 209990224 is about 14491.0394382184. The cubic root of 209990224 is about 594.3829716759.

The spelling of 209990224 in words is "two hundred nine million, nine hundred ninety thousand, two hundred twenty-four".