521404113 has 8 divisors (see below), whose sum is σ = 695836800. Its totient is φ = 347287088.

The previous prime is 521404069. The next prime is 521404129. The reversal of 521404113 is 311404125.

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

It is a cyclic number.

It is not a de Polignac number, because 521404113 - 2¹⁰ = 521403089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 521404113.

It is not an unprimeable number, because it can be changed into a prime (521404133) 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 7 ways as a sum of consecutive naturals, for example, 75033 + ... + 81686.

It is an arithmetic number, because the mean of its divisors is an integer number (86979600).

Almost surely, 2^521404113 is an apocalyptic number.

It is an amenable number.

521404113 is a deficient number, since it is larger than the sum of its proper divisors (174432687).

521404113 is a wasteful number, since it uses less digits than its factorization.

521404113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157831.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 521404113 is about 22834.2749611193. The cubic root of 521404113 is about 804.8682901164.

Adding to 521404113 its reverse (311404125), we get a palindrome (832808238).

The spelling of 521404113 in words is "five hundred twenty-one million, four hundred four thousand, one hundred thirteen".