205256237 has 4 divisors (see below), whose sum is σ = 207249120. Its totient is φ = 203263356.

The previous prime is 205256231. The next prime is 205256267. The reversal of 205256237 is 732652502.

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 205256237 - 2⁶ = 205256173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205256231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 996287 + ... + 996492.

It is an arithmetic number, because the mean of its divisors is an integer number (51812280).

Almost surely, 2^205256237 is an apocalyptic number.

It is an amenable number.

205256237 is a deficient number, since it is larger than the sum of its proper divisors (1992883).

205256237 is a wasteful number, since it uses less digits than its factorization.

205256237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992882.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 205256237 is about 14326.7664530417. The cubic root of 205256237 is about 589.8824212696.

It can be divided in two parts, 20525 and 6237, that added together give a palindrome (26762).

The spelling of 205256237 in words is "two hundred five million, two hundred fifty-six thousand, two hundred thirty-seven".