520712281 has 2 divisors, whose sum is σ = 520712282. Its totient is φ = 520712280.

The previous prime is 520712251. The next prime is 520712299. The reversal of 520712281 is 182217025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 461175625 + 59536656 = 21475^2 + 7716^2 .

It is a cyclic number.

It is not a de Polignac number, because 520712281 - 2¹¹ = 520710233 is a prime.

It is a super-2 number, since 2×520712281² = 542282559168445922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (520712221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260356140 + 260356141.

It is an arithmetic number, because the mean of its divisors is an integer number (260356141).

Almost surely, 2^520712281 is an apocalyptic number.

It is an amenable number.

520712281 is a deficient number, since it is larger than the sum of its proper divisors (1).

520712281 is an equidigital number, since it uses as much as digits as its factorization.

520712281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 520712281 is about 22819.1209515178. The cubic root of 520712281 is about 804.5121491454.

The spelling of 520712281 in words is "five hundred twenty million, seven hundred twelve thousand, two hundred eighty-one".