524521013 has 4 divisors (see below), whose sum is σ = 525058860. Its totient is φ = 523983168.

The previous prime is 524521007. The next prime is 524521037. The reversal of 524521013 is 310125425.

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 500774884 + 23746129 = 22378^2 + 4873^2 .

It is a cyclic number.

It is not a de Polignac number, because 524521013 - 2⁸ = 524520757 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 524521013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (524521813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267458 + ... + 269411.

It is an arithmetic number, because the mean of its divisors is an integer number (131264715).

Almost surely, 2^524521013 is an apocalyptic number.

It is an amenable number.

524521013 is a deficient number, since it is larger than the sum of its proper divisors (537847).

524521013 is an equidigital number, since it uses as much as digits as its factorization.

524521013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537846.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 524521013 is about 22902.4237363647. The cubic root of 524521013 is about 806.4689114274.

Adding to 524521013 its reverse (310125425), we get a palindrome (834646438).

The spelling of 524521013 in words is "five hundred twenty-four million, five hundred twenty-one thousand, thirteen".