520280531 has 2 divisors, whose sum is σ = 520280532. Its totient is φ = 520280530.

The previous prime is 520280479. The next prime is 520280543. The reversal of 520280531 is 135082025.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520280531 is a prime.

It is a super-2 number, since 2×520280531² = 541383661875283922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 520280531.

It is not a weakly prime, because it can be changed into another prime (520289531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260140265 + 260140266.

It is an arithmetic number, because the mean of its divisors is an integer number (260140266).

Almost surely, 2^520280531 is an apocalyptic number.

520280531 is a deficient number, since it is larger than the sum of its proper divisors (1).

520280531 is an equidigital number, since it uses as much as digits as its factorization.

520280531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 520280531 is about 22809.6587216907. The cubic root of 520280531 is about 804.2897331850.

The spelling of 520280531 in words is "five hundred twenty million, two hundred eighty thousand, five hundred thirty-one".