165003225 has 12 divisors (see below), whose sum is σ = 272805456. Its totient is φ = 88001680.

The previous prime is 165003203. The next prime is 165003233. The reversal of 165003225 is 522300561.

It is not a de Polignac number, because 165003225 - 2⁵ = 165003193 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 165003195 and 165003204.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1099947 + ... + 1100096.

It is an arithmetic number, because the mean of its divisors is an integer number (22733788).

Almost surely, 2^165003225 is an apocalyptic number.

165003225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165003225 is a deficient number, since it is larger than the sum of its proper divisors (107802231).

165003225 is a wasteful number, since it uses less digits than its factorization.

165003225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2200056 (or 2200051 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 165003225 is about 12845.3581110065. The cubic root of 165003225 is about 548.4842286546.

Adding to 165003225 its reverse (522300561), we get a palindrome (687303786).

The spelling of 165003225 in words is "one hundred sixty-five million, three thousand, two hundred twenty-five".