165211325 has 12 divisors (see below), whose sum is σ = 205025940. Its totient is φ = 132063360.

The previous prime is 165211313. The next prime is 165211331. The reversal of 165211325 is 523112561.

It can be written as a sum of positive squares in 6 ways, for example, as 25664356 + 139546969 = 5066^2 + 11813^2 .

It is not a de Polignac number, because 165211325 - 2⁴ = 165211309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165211294 and 165211303.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49097 + ... + 52353.

It is an arithmetic number, because the mean of its divisors is an integer number (17085495).

Almost surely, 2^165211325 is an apocalyptic number.

It is an amenable number.

165211325 is a deficient number, since it is larger than the sum of its proper divisors (39814615).

165211325 is a wasteful number, since it uses less digits than its factorization.

165211325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5296 (or 5291 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 165211325 is about 12853.4557610006. The cubic root of 165211325 is about 548.7147122664.

Adding to 165211325 its reverse (523112561), we get a palindrome (688323886).

The spelling of 165211325 in words is "one hundred sixty-five million, two hundred eleven thousand, three hundred twenty-five".