201323165 has 16 divisors (see below), whose sum is σ = 243962928. Its totient is φ = 159484416.

The previous prime is 201323159. The next prime is 201323189. The reversal of 201323165 is 561323102.

It can be written as a sum of positive squares in 8 ways, for example, as 11682724 + 189640441 = 3418^2 + 13771^2 .

It is a cyclic number.

It is not a de Polignac number, because 201323165 - 2⁴ = 201323149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201323165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307979 + ... + 308631.

It is an arithmetic number, because the mean of its divisors is an integer number (15247683).

Almost surely, 2^201323165 is an apocalyptic number.

It is an amenable number.

201323165 is a deficient number, since it is larger than the sum of its proper divisors (42639763).

201323165 is a wasteful number, since it uses less digits than its factorization.

201323165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 201323165 is about 14188.8394521892. The cubic root of 201323165 is about 586.0903666546.

Adding to 201323165 its reverse (561323102), we get a palindrome (762646267).

The spelling of 201323165 in words is "two hundred one million, three hundred twenty-three thousand, one hundred sixty-five".