165313225 has 72 divisors (see below), whose sum is σ = 265719104. Its totient is φ = 99792000.

The previous prime is 165313171. The next prime is 165313261. The reversal of 165313225 is 522313561.

It is not a de Polignac number, because 165313225 - 2⁷ = 165313097 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 165313193 and 165313202.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 783370 + ... + 783580.

Almost surely, 2^165313225 is an apocalyptic number.

It is an amenable number.

165313225 is a deficient number, since it is larger than the sum of its proper divisors (100405879).

165313225 is a wasteful number, since it uses less digits than its factorization.

165313225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 271 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

The square root of 165313225 is about 12857.4190644935. The cubic root of 165313225 is about 548.8275022289.

Adding to 165313225 its reverse (522313561), we get a palindrome (687626786).

It can be divided in two parts, 1653 and 13225, that added together give a triangular number (14878 = T₁₇₂).

The spelling of 165313225 in words is "one hundred sixty-five million, three hundred thirteen thousand, two hundred twenty-five".