520160621 has 2 divisors, whose sum is σ = 520160622. Its totient is φ = 520160620.

The previous prime is 520160561. The next prime is 520160623. The reversal of 520160621 is 126061025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 475458025 + 44702596 = 21805^2 + 6686^2 .

It is a cyclic number.

It is not a de Polignac number, because 520160621 - 2¹⁰ = 520159597 is a prime.

Together with 520160623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520160623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260080310 + 260080311.

It is an arithmetic number, because the mean of its divisors is an integer number (260080311).

Almost surely, 2^520160621 is an apocalyptic number.

It is an amenable number.

520160621 is a deficient number, since it is larger than the sum of its proper divisors (1).

520160621 is an equidigital number, since it uses as much as digits as its factorization.

520160621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 520160621 is about 22807.0300784648. The cubic root of 520160621 is about 804.2279397318.

The spelling of 520160621 in words is "five hundred twenty million, one hundred sixty thousand, six hundred twenty-one".