521534113 has 2 divisors, whose sum is σ = 521534114. Its totient is φ = 521534112.

The previous prime is 521534107. The next prime is 521534147. The reversal of 521534113 is 311435125.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288422289 + 233111824 = 16983^2 + 15268^2 .

It is a cyclic number.

It is not a de Polignac number, because 521534113 - 2⁵ = 521534081 is a prime.

It is not a weakly prime, because it can be changed into another prime (521534183) 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 as a sum of consecutive naturals, namely, 260767056 + 260767057.

It is an arithmetic number, because the mean of its divisors is an integer number (260767057).

Almost surely, 2^521534113 is an apocalyptic number.

It is an amenable number.

521534113 is a deficient number, since it is larger than the sum of its proper divisors (1).

521534113 is an equidigital number, since it uses as much as digits as its factorization.

521534113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 521534113 is about 22837.1213816453. The cubic root of 521534113 is about 804.9351762932.

Adding to 521534113 its reverse (311435125), we get a palindrome (832969238).

The spelling of 521534113 in words is "five hundred twenty-one million, five hundred thirty-four thousand, one hundred thirteen".