165411229 has 4 divisors (see below), whose sum is σ = 166268476. Its totient is φ = 164553984.

The previous prime is 165411221. The next prime is 165411269. The reversal of 165411229 is 922114561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12320100 + 153091129 = 3510^2 + 12373^2 .

It is a cyclic number.

It is not a de Polignac number, because 165411229 - 2³ = 165411221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165411229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165411221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428334 + ... + 428719.

It is an arithmetic number, because the mean of its divisors is an integer number (41567119).

Almost surely, 2^165411229 is an apocalyptic number.

It is an amenable number.

165411229 is a deficient number, since it is larger than the sum of its proper divisors (857247).

165411229 is an equidigital number, since it uses as much as digits as its factorization.

165411229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857246.

The product of its digits is 4320, while the sum is 31.

The square root of 165411229 is about 12861.2296845986. The cubic root of 165411229 is about 548.9359361124.

The spelling of 165411229 in words is "one hundred sixty-five million, four hundred eleven thousand, two hundred twenty-nine".