206505515219 has 2 divisors, whose sum is σ = 206505515220. Its totient is φ = 206505515218.

The previous prime is 206505515191. The next prime is 206505515231. The reversal of 206505515219 is 912515505602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206505515219 is a prime.

It is a super-2 number, since 2×206505515219² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206505515819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103252757609 + 103252757610.

It is an arithmetic number, because the mean of its divisors is an integer number (103252757610).

Almost surely, 2^206505515219 is an apocalyptic number.

206505515219 is a deficient number, since it is larger than the sum of its proper divisors (1).

206505515219 is an equidigital number, since it uses as much as digits as its factorization.

206505515219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 206505515219 in words is "two hundred six billion, five hundred five million, five hundred fifteen thousand, two hundred nineteen".