520550491 has 2 divisors, whose sum is σ = 520550492. Its totient is φ = 520550490.

The previous prime is 520550479. The next prime is 520550497. The reversal of 520550491 is 194055025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520550491 - 2²³ = 512161883 is a prime.

It is not a weakly prime, because it can be changed into another prime (520550497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260275245 + 260275246.

It is an arithmetic number, because the mean of its divisors is an integer number (260275246).

Almost surely, 2^520550491 is an apocalyptic number.

520550491 is a deficient number, since it is larger than the sum of its proper divisors (1).

520550491 is an equidigital number, since it uses as much as digits as its factorization.

520550491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 520550491 is about 22815.5756228065. The cubic root of 520550491 is about 804.4288174550.

It can be divided in two parts, 5205 and 50491, that added together give a square (55696 = 236²).

The spelling of 520550491 in words is "five hundred twenty million, five hundred fifty thousand, four hundred ninety-one".