521322713 has 2 divisors, whose sum is σ = 521322714. Its totient is φ = 521322712.

The previous prime is 521322709. The next prime is 521322727. The reversal of 521322713 is 317223125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 458088409 + 63234304 = 21403^2 + 7952^2 .

It is a cyclic number.

It is not a de Polignac number, because 521322713 - 2² = 521322709 is a prime.

It is not a weakly prime, because it can be changed into another prime (521322743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260661356 + 260661357.

It is an arithmetic number, because the mean of its divisors is an integer number (260661357).

Almost surely, 2^521322713 is an apocalyptic number.

It is an amenable number.

521322713 is a deficient number, since it is larger than the sum of its proper divisors (1).

521322713 is an equidigital number, since it uses as much as digits as its factorization.

521322713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 26.

The square root of 521322713 is about 22832.4924833011. The cubic root of 521322713 is about 804.8264034193.

Adding to 521322713 its reverse (317223125), we get a palindrome (838545838).

It can be divided in two parts, 52132 and 2713, that added together give a palindrome (54845).

The spelling of 521322713 in words is "five hundred twenty-one million, three hundred twenty-two thousand, seven hundred thirteen".