165531056 has 20 divisors (see below), whose sum is σ = 321184800. Its totient is φ = 82644672.

The previous prime is 165531001. The next prime is 165531061. The reversal of 165531056 is 650135561.

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, 4310 + ... + 18698.

It is an arithmetic number, because the mean of its divisors is an integer number (16059240).

Almost surely, 2^165531056 is an apocalyptic number.

165531056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165531056 is a deficient number, since it is larger than the sum of its proper divisors (155653744).

165531056 is a wasteful number, since it uses less digits than its factorization.

165531056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15116 (or 15110 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 165531056 is about 12865.8872993665. The cubic root of 165531056 is about 549.0684572836.

The spelling of 165531056 in words is "one hundred sixty-five million, five hundred thirty-one thousand, fifty-six".