205255231 has 2 divisors, whose sum is σ = 205255232. Its totient is φ = 205255230.

The previous prime is 205255223. The next prime is 205255279. The reversal of 205255231 is 132552502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205255231 - 2³ = 205255223 is a prime.

It is a super-2 number, since 2×205255231² = 84259419705726722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205255196 and 205255205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205255291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102627615 + 102627616.

It is an arithmetic number, because the mean of its divisors is an integer number (102627616).

Almost surely, 2^205255231 is an apocalyptic number.

205255231 is a deficient number, since it is larger than the sum of its proper divisors (1).

205255231 is an equidigital number, since it uses as much as digits as its factorization.

205255231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 205255231 is about 14326.7313438900. The cubic root of 205255231 is about 589.8814575592.

The spelling of 205255231 in words is "two hundred five million, two hundred fifty-five thousand, two hundred thirty-one".