205253519 has 2 divisors, whose sum is σ = 205253520. Its totient is φ = 205253518.

The previous prime is 205253497. The next prime is 205253549. The reversal of 205253519 is 915352502.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205253519 is a prime.

It is a super-2 number, since 2×205253519² = 84258014123766722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205253549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102626759 + 102626760.

It is an arithmetic number, because the mean of its divisors is an integer number (102626760).

Almost surely, 2^205253519 is an apocalyptic number.

205253519 is a deficient number, since it is larger than the sum of its proper divisors (1).

205253519 is an equidigital number, since it uses as much as digits as its factorization.

205253519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 205253519 is about 14326.6715953148. The cubic root of 205253519 is about 589.8798175200.

The spelling of 205253519 in words is "two hundred five million, two hundred fifty-three thousand, five hundred nineteen".