165280087 has 12 divisors (see below), whose sum is σ = 194702880. Its totient is φ = 139872096.

The previous prime is 165280081. The next prime is 165280091. The reversal of 165280087 is 780082561.

It is a de Polignac number, because none of the positive numbers 2^k-165280087 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 (165280081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17478 + ... + 25219.

It is an arithmetic number, because the mean of its divisors is an integer number (16225240).

Almost surely, 2^165280087 is an apocalyptic number.

165280087 is a deficient number, since it is larger than the sum of its proper divisors (29422793).

165280087 is an equidigital number, since it uses as much as digits as its factorization.

165280087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42790 (or 42783 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 165280087 is about 12856.1303275908. The cubic root of 165280087 is about 548.7908278871.

The spelling of 165280087 in words is "one hundred sixty-five million, two hundred eighty thousand, eighty-seven".