165115711 has 2 divisors, whose sum is σ = 165115712. Its totient is φ = 165115710.

The previous prime is 165115661. The next prime is 165115721. The reversal of 165115711 is 117511561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165115711 - 2⁷ = 165115583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165115711.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165115721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82557855 + 82557856.

It is an arithmetic number, because the mean of its divisors is an integer number (82557856).

Almost surely, 2^165115711 is an apocalyptic number.

165115711 is a deficient number, since it is larger than the sum of its proper divisors (1).

165115711 is an equidigital number, since it uses as much as digits as its factorization.

165115711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1050, while the sum is 28.

The square root of 165115711 is about 12849.7358338606. The cubic root of 165115711 is about 548.6088379004.

It can be divided in two parts, 16511 and 5711, that added together give a palindrome (22222).

The spelling of 165115711 in words is "one hundred sixty-five million, one hundred fifteen thousand, seven hundred eleven".