165316519 has 2 divisors, whose sum is σ = 165316520. Its totient is φ = 165316518.

The previous prime is 165316513. The next prime is 165316577. The reversal of 165316519 is 915613561.

It is a weak prime.

It is an emirp because it is prime and its reverse (915613561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165316519 - 2¹³ = 165308327 is a prime.

It is a super-2 number, since 2×165316519² = 54659102908554722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165316513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82658259 + 82658260.

It is an arithmetic number, because the mean of its divisors is an integer number (82658260).

Almost surely, 2^165316519 is an apocalyptic number.

165316519 is a deficient number, since it is larger than the sum of its proper divisors (1).

165316519 is an equidigital number, since it uses as much as digits as its factorization.

165316519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 37.

The square root of 165316519 is about 12857.5471611035. The cubic root of 165316519 is about 548.8311474823.

The spelling of 165316519 in words is "one hundred sixty-five million, three hundred sixteen thousand, five hundred nineteen".