165357225 has 72 divisors (see below), whose sum is σ = 327996864. Its totient is φ = 78960000.

The previous prime is 165357211. The next prime is 165357229. The reversal of 165357225 is 522753561.

165357225 is a `hidden beast` number, since 1 + 65 + 3 + 572 + 25 = 666.

It is not a de Polignac number, because 165357225 - 2⁸ = 165356969 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 165357225.

It is not an unprimeable number, because it can be changed into a prime (165357229) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 175255 + ... + 176195.

It is an arithmetic number, because the mean of its divisors is an integer number (4555512).

Almost surely, 2^165357225 is an apocalyptic number.

165357225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165357225 is a deficient number, since it is larger than the sum of its proper divisors (162639639).

165357225 is a wasteful number, since it uses less digits than its factorization.

165357225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039 (or 1031 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 165357225 is about 12859.1300250056. The cubic root of 165357225 is about 548.8761901423.

The spelling of 165357225 in words is "one hundred sixty-five million, three hundred fifty-seven thousand, two hundred twenty-five".