165332155 has 4 divisors (see below), whose sum is σ = 198398592. Its totient is φ = 132265720.

The previous prime is 165332107. The next prime is 165332177. The reversal of 165332155 is 551233561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551233561 = 41 ⋅13444721.

It is a de Polignac number, because none of the positive numbers 2^k-165332155 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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, 16533211 + ... + 16533220.

It is an arithmetic number, because the mean of its divisors is an integer number (49599648).

Almost surely, 2^165332155 is an apocalyptic number.

165332155 is a deficient number, since it is larger than the sum of its proper divisors (33066437).

165332155 is an equidigital number, since it uses as much as digits as its factorization.

165332155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33066436.

The product of its digits is 13500, while the sum is 31.

The square root of 165332155 is about 12858.1551942726. The cubic root of 165332155 is about 548.8484501558.

The spelling of 165332155 in words is "one hundred sixty-five million, three hundred thirty-two thousand, one hundred fifty-five".