520550249 has 2 divisors, whose sum is σ = 520550250. Its totient is φ = 520550248.

The previous prime is 520550179. The next prime is 520550257. The reversal of 520550249 is 942055025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 447618649 + 72931600 = 21157^2 + 8540^2 .

It is a cyclic number.

It is not a de Polignac number, because 520550249 - 2⁸ = 520549993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (520550279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260275124 + 260275125.

It is an arithmetic number, because the mean of its divisors is an integer number (260275125).

Almost surely, 2^520550249 is an apocalyptic number.

It is an amenable number.

520550249 is a deficient number, since it is larger than the sum of its proper divisors (1).

520550249 is an equidigital number, since it uses as much as digits as its factorization.

520550249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 520550249 is about 22815.5703194113. The cubic root of 520550249 is about 804.4286927973.

The spelling of 520550249 in words is "five hundred twenty million, five hundred fifty thousand, two hundred forty-nine".