205043251 has 4 divisors (see below), whose sum is σ = 234335152. Its totient is φ = 175751352.

The previous prime is 205043219. The next prime is 205043299. The reversal of 205043251 is 152340502.

205043251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 205043251 - 2⁵ = 205043219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205046251) 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, 14645940 + ... + 14645953.

It is an arithmetic number, because the mean of its divisors is an integer number (58583788).

Almost surely, 2^205043251 is an apocalyptic number.

205043251 is a deficient number, since it is larger than the sum of its proper divisors (29291901).

205043251 is an equidigital number, since it uses as much as digits as its factorization.

205043251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29291900.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 205043251 is about 14319.3313740551. The cubic root of 205043251 is about 589.6783183715.

Adding to 205043251 its reverse (152340502), we get a palindrome (357383753).

The spelling of 205043251 in words is "two hundred five million, forty-three thousand, two hundred fifty-one".