520221959 has 2 divisors, whose sum is σ = 520221960. Its totient is φ = 520221958.

The previous prime is 520221941. The next prime is 520221967. The reversal of 520221959 is 959122025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520221959 - 2²⁸ = 251786503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520221929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260110979 + 260110980.

It is an arithmetic number, because the mean of its divisors is an integer number (260110980).

Almost surely, 2^520221959 is an apocalyptic number.

520221959 is a deficient number, since it is larger than the sum of its proper divisors (1).

520221959 is an equidigital number, since it uses as much as digits as its factorization.

520221959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 520221959 is about 22808.3747557778. The cubic root of 520221959 is about 804.2595503488.

The spelling of 520221959 in words is "five hundred twenty million, two hundred twenty-one thousand, nine hundred fifty-nine".