520272521 has 2 divisors, whose sum is σ = 520272522. Its totient is φ = 520272520.

The previous prime is 520272427. The next prime is 520272527. The reversal of 520272521 is 125272025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276756496 + 243516025 = 16636^2 + 15605^2 .

It is a cyclic number.

It is not a de Polignac number, because 520272521 - 2¹⁸ = 520010377 is a prime.

It is a super-2 number, since 2×520272521² = 541366992215390882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (520272527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260136260 + 260136261.

It is an arithmetic number, because the mean of its divisors is an integer number (260136261).

Almost surely, 2^520272521 is an apocalyptic number.

It is an amenable number.

520272521 is a deficient number, since it is larger than the sum of its proper divisors (1).

520272521 is an equidigital number, since it uses as much as digits as its factorization.

520272521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 520272521 is about 22809.4831375023. The cubic root of 520272521 is about 804.2856056721.

The spelling of 520272521 in words is "five hundred twenty million, two hundred seventy-two thousand, five hundred twenty-one".