165555552 has 24 divisors (see below), whose sum is σ = 434583576. Its totient is φ = 55185152.

The previous prime is 165555529. The next prime is 165555601. The reversal of 165555552 is 255555561.

165555552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 165555552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 862173 + ... + 862364.

It is an arithmetic number, because the mean of its divisors is an integer number (18107649).

Almost surely, 2^165555552 is an apocalyptic number.

165555552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165555552 is an abundant number, since it is smaller than the sum of its proper divisors (269028024).

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

165555552 is a wasteful number, since it uses less digits than its factorization.

165555552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724550 (or 1724542 counting only the distinct ones).

The product of its digits is 187500, while the sum is 39.

The square root of 165555552 is about 12866.8392389118. The cubic root of 165555552 is about 549.0955404542.

Subtracting 165555552 from its reverse (255555561), we obtain a palindrome (90000009).

The spelling of 165555552 in words is "one hundred sixty-five million, five hundred fifty-five thousand, five hundred fifty-two".