165303225 has 36 divisors (see below), whose sum is σ = 297278592. Its totient is φ = 87804000.

The previous prime is 165303221. The next prime is 165303227. The reversal of 165303225 is 522303561.

165303225 is a `hidden beast` number, since 1 + 653 + 0 + 3 + 2 + 2 + 5 = 666.

It is not a de Polignac number, because 165303225 - 2² = 165303221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165303221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 59620 + ... + 62330.

Almost surely, 2^165303225 is an apocalyptic number.

165303225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165303225 is a deficient number, since it is larger than the sum of its proper divisors (131975367).

165303225 is a wasteful number, since it uses less digits than its factorization.

165303225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2998 (or 2990 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 165303225 is about 12857.0301780777. The cubic root of 165303225 is about 548.8164355892.

Adding to 165303225 its reverse (522303561), we get a palindrome (687606786).

The spelling of 165303225 in words is "one hundred sixty-five million, three hundred three thousand, two hundred twenty-five".