520518881 has 2 divisors, whose sum is σ = 520518882. Its totient is φ = 520518880.

The previous prime is 520518871. The next prime is 520518919. The reversal of 520518881 is 188815025.

It is an a-pointer prime, because the next prime (520518919) can be obtained adding 520518881 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 498003856 + 22515025 = 22316^2 + 4745^2 .

It is a cyclic number.

It is not a de Polignac number, because 520518881 - 2¹⁰ = 520517857 is a prime.

It is a super-2 number, since 2×520518881² = 541879810954984322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (520518811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260259440 + 260259441.

It is an arithmetic number, because the mean of its divisors is an integer number (260259441).

Almost surely, 2^520518881 is an apocalyptic number.

It is an amenable number.

520518881 is a deficient number, since it is larger than the sum of its proper divisors (1).

520518881 is an equidigital number, since it uses as much as digits as its factorization.

520518881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25600, while the sum is 38.

The square root of 520518881 is about 22814.8828837669. The cubic root of 520518881 is about 804.4125343662.

The spelling of 520518881 in words is "five hundred twenty million, five hundred eighteen thousand, eight hundred eighty-one".