521813163 has 8 divisors (see below), whose sum is σ = 696294976. Its totient is φ = 347603400.

The previous prime is 521813077. The next prime is 521813197. The reversal of 521813163 is 361318125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 521813163 - 2⁹ = 521812651 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 521813163.

It is not an unprimeable number, because it can be changed into a prime (521813363) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 63493 + ... + 71238.

It is an arithmetic number, because the mean of its divisors is an integer number (87036872).

Almost surely, 2^521813163 is an apocalyptic number.

521813163 is a deficient number, since it is larger than the sum of its proper divisors (174481813).

521813163 is a wasteful number, since it uses less digits than its factorization.

521813163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136025.

The product of its digits is 4320, while the sum is 30.

The square root of 521813163 is about 22843.2301349875. The cubic root of 521813163 is about 805.0787125173.

It can be divided in two parts, 5218 and 13163, that added together give a palindrome (18381).

The spelling of 521813163 in words is "five hundred twenty-one million, eight hundred thirteen thousand, one hundred sixty-three".