520213423 has 2 divisors, whose sum is σ = 520213424. Its totient is φ = 520213422.

The previous prime is 520213411. The next prime is 520213427. The reversal of 520213423 is 324312025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520213423 - 2⁹ = 520212911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 520213394 and 520213403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520213427) 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, 260106711 + 260106712.

It is an arithmetic number, because the mean of its divisors is an integer number (260106712).

Almost surely, 2^520213423 is an apocalyptic number.

520213423 is a deficient number, since it is larger than the sum of its proper divisors (1).

520213423 is an equidigital number, since it uses as much as digits as its factorization.

520213423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 520213423 is about 22808.1876307610. The cubic root of 520213423 is about 804.2551514591.

Adding to 520213423 its reverse (324312025), we get a palindrome (844525448).

The spelling of 520213423 in words is "five hundred twenty million, two hundred thirteen thousand, four hundred twenty-three".