165501155 has 8 divisors (see below), whose sum is σ = 198763200. Its totient is φ = 132293056.

The previous prime is 165501143. The next prime is 165501163. The reversal of 165501155 is 551105561.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165501155 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6395 + ... + 19284.

It is an arithmetic number, because the mean of its divisors is an integer number (24845400).

Almost surely, 2^165501155 is an apocalyptic number.

165501155 is a deficient number, since it is larger than the sum of its proper divisors (33262045).

165501155 is a wasteful number, since it uses less digits than its factorization.

165501155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26973.

The product of its (nonzero) digits is 3750, while the sum is 29.

The square root of 165501155 is about 12864.7252205401. The cubic root of 165501155 is about 549.0353946366.

The spelling of 165501155 in words is "one hundred sixty-five million, five hundred one thousand, one hundred fifty-five".