205225843 has 4 divisors (see below), whose sum is σ = 205315488. Its totient is φ = 205136200.

The previous prime is 205225831. The next prime is 205225879. The reversal of 205225843 is 348522502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 348522502 = 2 ⋅174261251.

It is a cyclic number.

It is not a de Polignac number, because 205225843 - 2²⁵ = 171671411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205225043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41296 + ... + 45997.

It is an arithmetic number, because the mean of its divisors is an integer number (51328872).

Almost surely, 2^205225843 is an apocalyptic number.

205225843 is a deficient number, since it is larger than the sum of its proper divisors (89645).

205225843 is an equidigital number, since it uses as much as digits as its factorization.

205225843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89644.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 205225843 is about 14325.7056719730. The cubic root of 205225843 is about 589.8533035651.

The spelling of 205225843 in words is "two hundred five million, two hundred twenty-five thousand, eight hundred forty-three".