165036019 has 4 divisors (see below), whose sum is σ = 165645280. Its totient is φ = 164426760.

The previous prime is 165036007. The next prime is 165036043. The reversal of 165036019 is 910630561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 910630561 = 139 ⋅6551299.

It is a cyclic number.

It is not a de Polignac number, because 165036019 - 2⁵ = 165035987 is a prime.

It is a super-2 number, since 2×165036019² = 54473775134736722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165036089) 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, 304224 + ... + 304765.

It is an arithmetic number, because the mean of its divisors is an integer number (41411320).

Almost surely, 2^165036019 is an apocalyptic number.

165036019 is a deficient number, since it is larger than the sum of its proper divisors (609261).

165036019 is an equidigital number, since it uses as much as digits as its factorization.

165036019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609260.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 165036019 is about 12846.6345398318. The cubic root of 165036019 is about 548.5205628945.

It can be divided in two parts, 16503 and 6019, that added together give a palindrome (22522).

The spelling of 165036019 in words is "one hundred sixty-five million, thirty-six thousand, nineteen".