165513021303 has 16 divisors (see below), whose sum is σ = 252218220800. Its totient is φ = 94575905856.

The previous prime is 165513021287. The next prime is 165513021307. The reversal of 165513021303 is 303120315561.

165513021303 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165513021303 - 2⁴ = 165513021287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165513021307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 686148 + ... + 895446.

It is an arithmetic number, because the mean of its divisors is an integer number (15763638800).

Almost surely, 2^165513021303 is an apocalyptic number.

165513021303 is a deficient number, since it is larger than the sum of its proper divisors (86705199497).

165513021303 is a wasteful number, since it uses less digits than its factorization.

165513021303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246966.

The product of its (nonzero) digits is 8100, while the sum is 30.

Adding to 165513021303 its reverse (303120315561), we get a palindrome (468633336864).

The spelling of 165513021303 in words is "one hundred sixty-five billion, five hundred thirteen million, twenty-one thousand, three hundred three".