165564552 has 32 divisors (see below), whose sum is σ = 427265280. Its totient is φ = 53407680.

The previous prime is 165564551. The next prime is 165564563. The reversal of 165564552 is 255465561.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 165564552.

It is not an unprimeable number, because it can be changed into a prime (165564551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110523 + ... + 112010.

It is an arithmetic number, because the mean of its divisors is an integer number (13352040).

Almost surely, 2^165564552 is an apocalyptic number.

165564552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165564552 is an abundant number, since it is smaller than the sum of its proper divisors (261700728).

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

165564552 is a wasteful number, since it uses less digits than its factorization.

165564552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222573 (or 222569 counting only the distinct ones).

The product of its digits is 180000, while the sum is 39.

The square root of 165564552 is about 12867.1889704006. The cubic root of 165564552 is about 549.1054903276.

The spelling of 165564552 in words is "one hundred sixty-five million, five hundred sixty-four thousand, five hundred fifty-two".