521424543 has 16 divisors (see below), whose sum is σ = 733066880. Its totient is φ = 328761504.

The previous prime is 521424539. The next prime is 521424577. The reversal of 521424543 is 345424125.

It is not a de Polignac number, because 521424543 - 2² = 521424539 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 521424543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521424503) 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 15 ways as a sum of consecutive naturals, for example, 27480 + ... + 42402.

It is an arithmetic number, because the mean of its divisors is an integer number (45816680).

Almost surely, 2^521424543 is an apocalyptic number.

521424543 is a deficient number, since it is larger than the sum of its proper divisors (211642337).

521424543 is a wasteful number, since it uses less digits than its factorization.

521424543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15558.

The product of its digits is 19200, while the sum is 30.

The square root of 521424543 is about 22834.7223105515. The cubic root of 521424543 is about 804.8788022726.

Adding to 521424543 its reverse (345424125), we get a palindrome (866848668).

The spelling of 521424543 in words is "five hundred twenty-one million, four hundred twenty-four thousand, five hundred forty-three".