520221430009 has 2 divisors, whose sum is σ = 520221430010. Its totient is φ = 520221430008.

The previous prime is 520221429953. The next prime is 520221430019. The reversal of 520221430009 is 900034122025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 444515558400 + 75705871609 = 666720^2 + 275147^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520221430009 is a prime.

It is not a weakly prime, because it can be changed into another prime (520221430019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260110715004 + 260110715005.

It is an arithmetic number, because the mean of its divisors is an integer number (260110715005).

Almost surely, 2^520221430009 is an apocalyptic number.

It is an amenable number.

520221430009 is a deficient number, since it is larger than the sum of its proper divisors (1).

520221430009 is an equidigital number, since it uses as much as digits as its factorization.

520221430009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The spelling of 520221430009 in words is "five hundred twenty billion, two hundred twenty-one million, four hundred thirty thousand, nine".