521314561 has 2 divisors, whose sum is σ = 521314562. Its totient is φ = 521314560.

The previous prime is 521314543. The next prime is 521314579. The reversal of 521314561 is 165413125.

It is a balanced prime because it is at equal distance from previous prime (521314543) and next prime (521314579).

It can be written as a sum of positive squares in only one way, i.e., 301682161 + 219632400 = 17369^2 + 14820^2 .

It is a cyclic number.

It is not a de Polignac number, because 521314561 - 2⁹ = 521314049 is a prime.

It is not a weakly prime, because it can be changed into another prime (521314511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260657280 + 260657281.

It is an arithmetic number, because the mean of its divisors is an integer number (260657281).

Almost surely, 2^521314561 is an apocalyptic number.

It is an amenable number.

521314561 is a deficient number, since it is larger than the sum of its proper divisors (1).

521314561 is an equidigital number, since it uses as much as digits as its factorization.

521314561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 521314561 is about 22832.3139650803. The cubic root of 521314561 is about 804.8222083344.

Adding to 521314561 its reverse (165413125), we get a palindrome (686727686).

The spelling of 521314561 in words is "five hundred twenty-one million, three hundred fourteen thousand, five hundred sixty-one".