520295561 has 2 divisors, whose sum is σ = 520295562. Its totient is φ = 520295560.

The previous prime is 520295551. The next prime is 520295569. The reversal of 520295561 is 165592025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 296493961 + 223801600 = 17219^2 + 14960^2 .

It is a cyclic number.

It is not a de Polignac number, because 520295561 - 2⁶ = 520295497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (520295569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260147780 + 260147781.

It is an arithmetic number, because the mean of its divisors is an integer number (260147781).

Almost surely, 2^520295561 is an apocalyptic number.

It is an amenable number.

520295561 is a deficient number, since it is larger than the sum of its proper divisors (1).

520295561 is an equidigital number, since it uses as much as digits as its factorization.

520295561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 520295561 is about 22809.9881850035. The cubic root of 520295561 is about 804.2974779545.

The spelling of 520295561 in words is "five hundred twenty million, two hundred ninety-five thousand, five hundred sixty-one".