524243213 has 4 divisors (see below), whose sum is σ = 564569628. Its totient is φ = 483916800.

The previous prime is 524243177. The next prime is 524243233. The reversal of 524243213 is 312342425.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90687529 + 433555684 = 9523^2 + 20822^2 .

It is a cyclic number.

It is not a de Polignac number, because 524243213 - 2¹⁰ = 524242189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (524243233) 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, 20163188 + ... + 20163213.

It is an arithmetic number, because the mean of its divisors is an integer number (141142407).

Almost surely, 2^524243213 is an apocalyptic number.

It is an amenable number.

524243213 is a deficient number, since it is larger than the sum of its proper divisors (40326415).

524243213 is a wasteful number, since it uses less digits than its factorization.

524243213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40326414.

The product of its digits is 5760, while the sum is 26.

The square root of 524243213 is about 22896.3580728464. The cubic root of 524243213 is about 806.3265106327.

Adding to 524243213 its reverse (312342425), we get a palindrome (836585638).

The spelling of 524243213 in words is "five hundred twenty-four million, two hundred forty-three thousand, two hundred thirteen".