520253221 has 2 divisors, whose sum is σ = 520253222. Its totient is φ = 520253220.

The previous prime is 520253219. The next prime is 520253233. The reversal of 520253221 is 122352025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 513022500 + 7230721 = 22650^2 + 2689^2 .

It is a cyclic number.

It is not a de Polignac number, because 520253221 - 2¹ = 520253219 is a prime.

Together with 520253219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 520253192 and 520253201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520253291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260126610 + 260126611.

It is an arithmetic number, because the mean of its divisors is an integer number (260126611).

Almost surely, 2^520253221 is an apocalyptic number.

It is an amenable number.

520253221 is a deficient number, since it is larger than the sum of its proper divisors (1).

520253221 is an equidigital number, since it uses as much as digits as its factorization.

520253221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 520253221 is about 22809.0600639307. The cubic root of 520253221 is about 804.2756603047.

The spelling of 520253221 in words is "five hundred twenty million, two hundred fifty-three thousand, two hundred twenty-one".