520831243237 has 2 divisors, whose sum is σ = 520831243238. Its totient is φ = 520831243236.

The previous prime is 520831243159. The next prime is 520831243253. The reversal of 520831243237 is 732342138025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 379177619076 + 141653624161 = 615774^2 + 376369^2 .

It is a cyclic number.

It is not a de Polignac number, because 520831243237 - 2¹⁵ = 520831210469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 520831243237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520831244237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260415621618 + 260415621619.

It is an arithmetic number, because the mean of its divisors is an integer number (260415621619).

Almost surely, 2^520831243237 is an apocalyptic number.

It is an amenable number.

520831243237 is a deficient number, since it is larger than the sum of its proper divisors (1).

520831243237 is an equidigital number, since it uses as much as digits as its factorization.

520831243237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 520831243237 in words is "five hundred twenty billion, eight hundred thirty-one million, two hundred forty-three thousand, two hundred thirty-seven".