165222311 has 2 divisors, whose sum is σ = 165222312. Its totient is φ = 165222310.

The previous prime is 165222293. The next prime is 165222313. The reversal of 165222311 is 113222561.

It is a strong prime.

It is an emirp because it is prime and its reverse (113222561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165222311 - 2¹⁴ = 165205927 is a prime.

Together with 165222313, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165222313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82611155 + 82611156.

It is an arithmetic number, because the mean of its divisors is an integer number (82611156).

Almost surely, 2^165222311 is an apocalyptic number.

165222311 is a deficient number, since it is larger than the sum of its proper divisors (1).

165222311 is an equidigital number, since it uses as much as digits as its factorization.

165222311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 23.

The square root of 165222311 is about 12853.8831097844. The cubic root of 165222311 is about 548.7268745606.

Adding to 165222311 its reverse (113222561), we get a palindrome (278444872).

The spelling of 165222311 in words is "one hundred sixty-five million, two hundred twenty-two thousand, three hundred eleven".