520228861 has 2 divisors, whose sum is σ = 520228862. Its totient is φ = 520228860.

The previous prime is 520228831. The next prime is 520228871. The reversal of 520228861 is 168822025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 277056025 + 243172836 = 16645^2 + 15594^2 .

It is a cyclic number.

It is not a de Polignac number, because 520228861 - 2¹¹ = 520226813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520228831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260114430 + 260114431.

It is an arithmetic number, because the mean of its divisors is an integer number (260114431).

Almost surely, 2^520228861 is an apocalyptic number.

It is an amenable number.

520228861 is a deficient number, since it is larger than the sum of its proper divisors (1).

520228861 is an equidigital number, since it uses as much as digits as its factorization.

520228861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 520228861 is about 22808.5260593489. The cubic root of 520228861 is about 804.2631071478.

The spelling of 520228861 in words is "five hundred twenty million, two hundred twenty-eight thousand, eight hundred sixty-one".