200242809 has 24 divisors (see below), whose sum is σ = 316606472. Its totient is φ = 121201920.

The previous prime is 200242799. The next prime is 200242831. The reversal of 200242809 is 908242002.

It can be written as a sum of positive squares in 4 ways, for example, as 1432809 + 198810000 = 1197^2 + 14100^2 .

It is not a de Polignac number, because 200242809 - 2¹⁵ = 200210041 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (200242849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6892 + ... + 21165.

Almost surely, 2^200242809 is an apocalyptic number.

It is an amenable number.

200242809 is a deficient number, since it is larger than the sum of its proper divisors (116363663).

200242809 is a wasteful number, since it uses less digits than its factorization.

200242809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28137 (or 28134 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 200242809 is about 14150.7176143120. The cubic root of 200242809 is about 585.0401112098.

The spelling of 200242809 in words is "two hundred million, two hundred forty-two thousand, eight hundred nine".