524416681 has 4 divisors (see below), whose sum is σ = 524471764. Its totient is φ = 524361600.

The previous prime is 524416679. The next prime is 524416687. The reversal of 524416681 is 186614425.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 311840281 + 212576400 = 17659^2 + 14580^2 .

It is a cyclic number.

It is not a de Polignac number, because 524416681 - 2¹ = 524416679 is a prime.

It is a super-2 number, since 2×524416681² = 550025710622111522, which contains 22 as substring.

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 524416681.

It is not an unprimeable number, because it can be changed into a prime (524416687) 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 3 ways as a sum of consecutive naturals, for example, 9180 + ... + 33661.

It is an arithmetic number, because the mean of its divisors is an integer number (131117941).

Almost surely, 2^524416681 is an apocalyptic number.

524416681 is the 12241-st nonagonal number.

It is an amenable number.

524416681 is a deficient number, since it is larger than the sum of its proper divisors (55083).

524416681 is a wasteful number, since it uses less digits than its factorization.

524416681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55082.

The product of its digits is 46080, while the sum is 37.

The square root of 524416681 is about 22900.1458728978. The cubic root of 524416681 is about 806.4154365479.

The spelling of 524416681 in words is "five hundred twenty-four million, four hundred sixteen thousand, six hundred eighty-one".