205120231 has 2 divisors, whose sum is σ = 205120232. Its totient is φ = 205120230.

The previous prime is 205120183. The next prime is 205120271. The reversal of 205120231 is 132021502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205120231 - 2¹¹ = 205118183 is a prime.

It is a super-2 number, since 2×205120231² = 84148618330986722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205120271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102560115 + 102560116.

It is an arithmetic number, because the mean of its divisors is an integer number (102560116).

Almost surely, 2^205120231 is an apocalyptic number.

205120231 is a deficient number, since it is larger than the sum of its proper divisors (1).

205120231 is an equidigital number, since it uses as much as digits as its factorization.

205120231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 205120231 is about 14322.0190964822. The cubic root of 205120231 is about 589.7521040357.

Adding to 205120231 its reverse (132021502), we get a palindrome (337141733).

The spelling of 205120231 in words is "two hundred five million, one hundred twenty thousand, two hundred thirty-one".