165564522 has 24 divisors (see below), whose sum is σ = 359145540. Its totient is φ = 55123200.

The previous prime is 165564517. The next prime is 165564533. The reversal of 165564522 is 225465561.

165564522 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 645 + 2 + 2 = 666.

165564522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 165405321 + 159201 = 12861^2 + 399^2 .

It is a super-2 number, since 2×165564522² = 54823221890176968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11772 + ... + 21672.

Almost surely, 2^165564522 is an apocalyptic number.

165564522 is an abundant number, since it is smaller than the sum of its proper divisors (193581018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165564522 is a wasteful number, since it uses less digits than its factorization.

165564522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10838 (or 10835 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 165564522 is about 12867.1878046448. The cubic root of 165564522 is about 549.1054571619.

The spelling of 165564522 in words is "one hundred sixty-five million, five hundred sixty-four thousand, five hundred twenty-two".