165422587 has 4 divisors (see below), whose sum is σ = 180461016. Its totient is φ = 150384160.

The previous prime is 165422581. The next prime is 165422623. The reversal of 165422587 is 785224561.

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 165422587 - 2¹¹ = 165420539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165422581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7519198 + ... + 7519219.

It is an arithmetic number, because the mean of its divisors is an integer number (45115254).

Almost surely, 2^165422587 is an apocalyptic number.

165422587 is a deficient number, since it is larger than the sum of its proper divisors (15038429).

165422587 is a wasteful number, since it uses less digits than its factorization.

165422587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15038428.

The product of its digits is 134400, while the sum is 40.

The square root of 165422587 is about 12861.6712366628. The cubic root of 165422587 is about 548.9485000956.

The spelling of 165422587 in words is "one hundred sixty-five million, four hundred twenty-two thousand, five hundred eighty-seven".