205230251 has 2 divisors, whose sum is σ = 205230252. Its totient is φ = 205230250.

The previous prime is 205230227. The next prime is 205230253. The reversal of 205230251 is 152032502.

205230251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205230251 is a prime.

It is a Sophie Germain prime.

Together with 205230253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (205230253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102615125 + 102615126.

It is an arithmetic number, because the mean of its divisors is an integer number (102615126).

Almost surely, 2^205230251 is an apocalyptic number.

205230251 is a deficient number, since it is larger than the sum of its proper divisors (1).

205230251 is an equidigital number, since it uses as much as digits as its factorization.

205230251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 205230251 is about 14325.8595204616. The cubic root of 205230251 is about 589.8575266439.

Adding to 205230251 its reverse (152032502), we get a palindrome (357262753).

The spelling of 205230251 in words is "two hundred five million, two hundred thirty thousand, two hundred fifty-one".