205074257 has 4 divisors (see below), whose sum is σ = 205187136. Its totient is φ = 204961380.

The previous prime is 205074227. The next prime is 205074263. The reversal of 205074257 is 752470502.

205074257 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 205074257 - 2⁶ = 205074193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205074227) 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, 53669 + ... + 57362.

It is an arithmetic number, because the mean of its divisors is an integer number (51296784).

Almost surely, 2^205074257 is an apocalyptic number.

It is an amenable number.

205074257 is a deficient number, since it is larger than the sum of its proper divisors (112879).

205074257 is a wasteful number, since it uses less digits than its factorization.

205074257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112878.

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 205074257 is about 14320.4139954123. The cubic root of 205074257 is about 589.7080399779.

The spelling of 205074257 in words is "two hundred five million, seventy-four thousand, two hundred fifty-seven".