165023555 has 16 divisors (see below), whose sum is σ = 200249280. Its totient is φ = 130547712.

The previous prime is 165023549. The next prime is 165023557. The reversal of 165023555 is 555320561.

165023555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 165023555 - 2⁶ = 165023491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165023557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214211 + ... + 214979.

It is an arithmetic number, because the mean of its divisors is an integer number (12515580).

Almost surely, 2^165023555 is an apocalyptic number.

165023555 is a deficient number, since it is larger than the sum of its proper divisors (35225725).

165023555 is a wasteful number, since it uses less digits than its factorization.

165023555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198.

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 165023555 is about 12846.1494230762. The cubic root of 165023555 is about 548.5067539243.

The spelling of 165023555 in words is "one hundred sixty-five million, twenty-three thousand, five hundred fifty-five".