205147519 has 2 divisors, whose sum is σ = 205147520. Its totient is φ = 205147518.

The previous prime is 205147507. The next prime is 205147567. The reversal of 205147519 is 915741502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205147519 - 2⁵ = 205147487 is a prime.

It is a super-2 number, since 2×205147519² = 84171009103710722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205145519) 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 as a sum of consecutive naturals, namely, 102573759 + 102573760.

It is an arithmetic number, because the mean of its divisors is an integer number (102573760).

Almost surely, 2^205147519 is an apocalyptic number.

205147519 is a deficient number, since it is larger than the sum of its proper divisors (1).

205147519 is an equidigital number, since it uses as much as digits as its factorization.

205147519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 205147519 is about 14322.9717237730. The cubic root of 205147519 is about 589.7782552702.

The spelling of 205147519 in words is "two hundred five million, one hundred forty-seven thousand, five hundred nineteen".