165200553 has 20 divisors (see below), whose sum is σ = 282036480. Its totient is φ = 94399992.

The previous prime is 165200537. The next prime is 165200561. The reversal of 165200553 is 355002561.

165200553 is a `hidden beast` number, since 1 + 652 + 0 + 0 + 5 + 5 + 3 = 666.

It is not a de Polignac number, because 165200553 - 2⁴ = 165200537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165200593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 145113 + ... + 146246.

It is an arithmetic number, because the mean of its divisors is an integer number (14101824).

Almost surely, 2^165200553 is an apocalyptic number.

It is an amenable number.

165200553 is a deficient number, since it is larger than the sum of its proper divisors (116835927).

165200553 is an equidigital number, since it uses as much as digits as its factorization.

165200553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291378 (or 291369 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 165200553 is about 12853.0367228916. The cubic root of 165200553 is about 548.7027863621.

The spelling of 165200553 in words is "one hundred sixty-five million, two hundred thousand, five hundred fifty-three".