521252543 has 6 divisors (see below), whose sum is σ = 606355056. Its totient is φ = 446787852.

The previous prime is 521252539. The next prime is 521252573. The reversal of 521252543 is 345252125.

It is not a de Polignac number, because 521252543 - 2² = 521252539 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521252573) 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 5 ways as a sum of consecutive naturals, for example, 5318855 + ... + 5318952.

It is an arithmetic number, because the mean of its divisors is an integer number (101059176).

Almost surely, 2^521252543 is an apocalyptic number.

521252543 is a deficient number, since it is larger than the sum of its proper divisors (85102513).

521252543 is a wasteful number, since it uses less digits than its factorization.

521252543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10637821 (or 10637814 counting only the distinct ones).

The product of its digits is 12000, while the sum is 29.

The square root of 521252543 is about 22830.9558056600. The cubic root of 521252543 is about 804.7902919402.

The spelling of 521252543 in words is "five hundred twenty-one million, two hundred fifty-two thousand, five hundred forty-three".