165022415 has 4 divisors (see below), whose sum is σ = 198026904. Its totient is φ = 132017928.

The previous prime is 165022411. The next prime is 165022423. The reversal of 165022415 is 514220561.

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

It is a cyclic number.

It is not a de Polignac number, because 165022415 - 2² = 165022411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165022411) 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, 16502237 + ... + 16502246.

It is an arithmetic number, because the mean of its divisors is an integer number (49506726).

Almost surely, 2^165022415 is an apocalyptic number.

165022415 is a deficient number, since it is larger than the sum of its proper divisors (33004489).

165022415 is an equidigital number, since it uses as much as digits as its factorization.

165022415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33004488.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 165022415 is about 12846.1050517268. The cubic root of 165022415 is about 548.5054908740.

Adding to 165022415 its reverse (514220561), we get a palindrome (679242976).

The spelling of 165022415 in words is "one hundred sixty-five million, twenty-two thousand, four hundred fifteen".