165022405 has 16 divisors (see below), whose sum is σ = 207717120. Its totient is φ = 125710272.

The previous prime is 165022399. The next prime is 165022411. The reversal of 165022405 is 504220561.

It is an interprime number because it is at equal distance from previous prime (165022399) and next prime (165022411).

It is a cyclic number.

It is not a de Polignac number, because 165022405 - 2³ = 165022397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165022405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 795 + ... + 18184.

It is an arithmetic number, because the mean of its divisors is an integer number (12982320).

Almost surely, 2^165022405 is an apocalyptic number.

It is an amenable number.

165022405 is a deficient number, since it is larger than the sum of its proper divisors (42694715).

165022405 is a wasteful number, since it uses less digits than its factorization.

165022405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19068.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 165022405 is about 12846.1046625037. The cubic root of 165022405 is about 548.5054797946.

Adding to 165022405 its reverse (504220561), we get a palindrome (669242966).

The spelling of 165022405 in words is "one hundred sixty-five million, twenty-two thousand, four hundred five".