205251043 has 4 divisors (see below), whose sum is σ = 210257208. Its totient is φ = 200244880.

The previous prime is 205251041. The next prime is 205251073. The reversal of 205251043 is 340152502.

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

It is a cyclic number.

It is not a de Polignac number, because 205251043 - 2¹ = 205251041 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205251041) 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, 2503021 + ... + 2503102.

It is an arithmetic number, because the mean of its divisors is an integer number (52564302).

Almost surely, 2^205251043 is an apocalyptic number.

205251043 is a deficient number, since it is larger than the sum of its proper divisors (5006165).

205251043 is an equidigital number, since it uses as much as digits as its factorization.

205251043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5006164.

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

The square root of 205251043 is about 14326.5851827991. The cubic root of 205251043 is about 589.8774455781.

The spelling of 205251043 in words is "two hundred five million, two hundred fifty-one thousand, forty-three".