165303311 has 2 divisors, whose sum is σ = 165303312. Its totient is φ = 165303310.

The previous prime is 165303289. The next prime is 165303319. The reversal of 165303311 is 113303561.

It is a happy number.

165303311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165303311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165303319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82651655 + 82651656.

It is an arithmetic number, because the mean of its divisors is an integer number (82651656).

Almost surely, 2^165303311 is an apocalyptic number.

165303311 is a deficient number, since it is larger than the sum of its proper divisors (1).

165303311 is an equidigital number, since it uses as much as digits as its factorization.

165303311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 165303311 is about 12857.0335225510. The cubic root of 165303311 is about 548.8165307642.

Adding to 165303311 its reverse (113303561), we get a palindrome (278606872).

The spelling of 165303311 in words is "one hundred sixty-five million, three hundred three thousand, three hundred eleven".