165223311 has 8 divisors (see below), whose sum is σ = 240324864. Its totient is φ = 100135320.

The previous prime is 165223307. The next prime is 165223327. The reversal of 165223311 is 113322561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165223311 - 2² = 165223307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165223361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2503351 + ... + 2503416.

It is an arithmetic number, because the mean of its divisors is an integer number (30040608).

Almost surely, 2^165223311 is an apocalyptic number.

165223311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

165223311 is a deficient number, since it is larger than the sum of its proper divisors (75101553).

165223311 is a wasteful number, since it uses less digits than its factorization.

165223311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5006781.

The product of its digits is 1080, while the sum is 24.

The square root of 165223311 is about 12853.9220084766. The cubic root of 165223311 is about 548.7279816059.

Adding to 165223311 its reverse (113322561), we get a palindrome (278545872).

The spelling of 165223311 in words is "one hundred sixty-five million, two hundred twenty-three thousand, three hundred eleven".