165560151 has 4 divisors (see below), whose sum is σ = 220746872. Its totient is φ = 110373432.

The previous prime is 165560147. The next prime is 165560201. The reversal of 165560151 is 151065561.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 165560151 - 2² = 165560147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165560051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27593356 + ... + 27593361.

It is an arithmetic number, because the mean of its divisors is an integer number (55186718).

Almost surely, 2^165560151 is an apocalyptic number.

165560151 is a deficient number, since it is larger than the sum of its proper divisors (55186721).

165560151 is an equidigital number, since it uses as much as digits as its factorization.

165560151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55186720.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 165560151 is about 12867.0179528903. The cubic root of 165560151 is about 549.1006248846.

The spelling of 165560151 in words is "one hundred sixty-five million, five hundred sixty thousand, one hundred fifty-one".