520505651 has 2 divisors, whose sum is σ = 520505652. Its totient is φ = 520505650.

The previous prime is 520505581. The next prime is 520505707. The reversal of 520505651 is 156505025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520505651 - 2¹⁰ = 520504627 is a prime.

It is a super-2 number, since 2×520505651² = 541852265445867602, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (520505351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260252825 + 260252826.

It is an arithmetic number, because the mean of its divisors is an integer number (260252826).

Almost surely, 2^520505651 is an apocalyptic number.

520505651 is a deficient number, since it is larger than the sum of its proper divisors (1).

520505651 is an equidigital number, since it uses as much as digits as its factorization.

520505651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 520505651 is about 22814.5929396078. The cubic root of 520505651 is about 804.4057190719.

The spelling of 520505651 in words is "five hundred twenty million, five hundred five thousand, six hundred fifty-one".