520427521 has 2 divisors, whose sum is σ = 520427522. Its totient is φ = 520427520.

The previous prime is 520427507. The next prime is 520427527. The reversal of 520427521 is 125724025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 360050625 + 160376896 = 18975^2 + 12664^2 .

It is a cyclic number.

It is not a de Polignac number, because 520427521 - 2²⁷ = 386209793 is a prime.

It is a super-2 number, since 2×520427521² = 541689609228410882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 520427521.

It is not a weakly prime, because it can be changed into another prime (520427527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260213760 + 260213761.

It is an arithmetic number, because the mean of its divisors is an integer number (260213761).

Almost surely, 2^520427521 is an apocalyptic number.

It is an amenable number.

520427521 is a deficient number, since it is larger than the sum of its proper divisors (1).

520427521 is an equidigital number, since it uses as much as digits as its factorization.

520427521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 520427521 is about 22812.8805940854. The cubic root of 520427521 is about 804.3654688758.

The spelling of 520427521 in words is "five hundred twenty million, four hundred twenty-seven thousand, five hundred twenty-one".