165229917 has 4 divisors (see below), whose sum is σ = 220306560. Its totient is φ = 110153276.

The previous prime is 165229891. The next prime is 165229937. The reversal of 165229917 is 719922561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165229917 - 2⁷ = 165229789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165229937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27538317 + ... + 27538322.

It is an arithmetic number, because the mean of its divisors is an integer number (55076640).

Almost surely, 2^165229917 is an apocalyptic number.

It is an amenable number.

165229917 is a deficient number, since it is larger than the sum of its proper divisors (55076643).

165229917 is an equidigital number, since it uses as much as digits as its factorization.

165229917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55076642.

The product of its digits is 68040, while the sum is 42.

The square root of 165229917 is about 12854.1789702804. The cubic root of 165229917 is about 548.7352946352.

The spelling of 165229917 in words is "one hundred sixty-five million, two hundred twenty-nine thousand, nine hundred seventeen".