205342154519 has 2 divisors, whose sum is σ = 205342154520. Its totient is φ = 205342154518.

The previous prime is 205342154453. The next prime is 205342154543. The reversal of 205342154519 is 915451243502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205342154519 - 2²⁰ = 205341105943 is a prime.

It is a super-2 number, since 2×205342154519² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205342154819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102671077259 + 102671077260.

It is an arithmetic number, because the mean of its divisors is an integer number (102671077260).

Almost surely, 2^205342154519 is an apocalyptic number.

205342154519 is a deficient number, since it is larger than the sum of its proper divisors (1).

205342154519 is an equidigital number, since it uses as much as digits as its factorization.

205342154519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 205342154519 in words is "two hundred five billion, three hundred forty-two million, one hundred fifty-four thousand, five hundred nineteen".