204252891 has 4 divisors (see below), whose sum is σ = 272337192. Its totient is φ = 136168592.

The previous prime is 204252883. The next prime is 204252899. The reversal of 204252891 is 198252402.

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

It is an interprime number because it is at equal distance from previous prime (204252883) and next prime (204252899).

It is a cyclic number.

It is not a de Polignac number, because 204252891 - 2³ = 204252883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204252899) 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, 34042146 + ... + 34042151.

It is an arithmetic number, because the mean of its divisors is an integer number (68084298).

Almost surely, 2^204252891 is an apocalyptic number.

204252891 is a deficient number, since it is larger than the sum of its proper divisors (68084301).

204252891 is an equidigital number, since it uses as much as digits as its factorization.

204252891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68084300.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 204252891 is about 14291.7070708855. The cubic root of 204252891 is about 588.9196845030.

The spelling of 204252891 in words is "two hundred four million, two hundred fifty-two thousand, eight hundred ninety-one".