130520521 has 2 divisors, whose sum is σ = 130520522. Its totient is φ = 130520520.

The previous prime is 130520513. The next prime is 130520531. The reversal of 130520521 is 125025031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104142025 + 26378496 = 10205^2 + 5136^2 .

It is a cyclic number.

It is not a de Polignac number, because 130520521 - 2³ = 130520513 is a prime.

It is a super-2 number, since 2×130520521² = 34071212804222882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (130520501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65260260 + 65260261.

It is an arithmetic number, because the mean of its divisors is an integer number (65260261).

Almost surely, 2^130520521 is an apocalyptic number.

It is an amenable number.

130520521 is a deficient number, since it is larger than the sum of its proper divisors (1).

130520521 is an equidigital number, since it uses as much as digits as its factorization.

130520521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 130520521 is about 11424.5578032587. The cubic root of 130520521 is about 507.2549178615.

Adding to 130520521 its reverse (125025031), we get a palindrome (255545552).

The spelling of 130520521 in words is "one hundred thirty million, five hundred twenty thousand, five hundred twenty-one".