165530553 has 8 divisors (see below), whose sum is σ = 220778400. Its totient is φ = 110318208.

The previous prime is 165530551. The next prime is 165530587. The reversal of 165530553 is 355035561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165530553 - 2¹ = 165530551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165530551) 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, 5193 + ... + 18921.

It is an arithmetic number, because the mean of its divisors is an integer number (27597300).

Almost surely, 2^165530553 is an apocalyptic number.

It is an amenable number.

165530553 is a deficient number, since it is larger than the sum of its proper divisors (55247847).

165530553 is a wasteful number, since it uses less digits than its factorization.

165530553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17751.

The product of its (nonzero) digits is 33750, while the sum is 33.

The square root of 165530553 is about 12865.8677515355. The cubic root of 165530553 is about 549.0679011307.

The spelling of 165530553 in words is "one hundred sixty-five million, five hundred thirty thousand, five hundred fifty-three".