520601551 has 2 divisors, whose sum is σ = 520601552. Its totient is φ = 520601550.

The previous prime is 520601531. The next prime is 520601567. The reversal of 520601551 is 155106025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520601551 - 2¹⁷ = 520470479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520601531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260300775 + 260300776.

It is an arithmetic number, because the mean of its divisors is an integer number (260300776).

Almost surely, 2^520601551 is an apocalyptic number.

520601551 is a deficient number, since it is larger than the sum of its proper divisors (1).

520601551 is an equidigital number, since it uses as much as digits as its factorization.

520601551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 520601551 is about 22816.6945677940. The cubic root of 520601551 is about 804.4551183251.

Adding to 520601551 its reverse (155106025), we get a palindrome (675707576).

The spelling of 520601551 in words is "five hundred twenty million, six hundred one thousand, five hundred fifty-one".