520442173 has 2 divisors, whose sum is σ = 520442174. Its totient is φ = 520442172.

The previous prime is 520442107. The next prime is 520442177. The reversal of 520442173 is 371244025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265624804 + 254817369 = 16298^2 + 15963^2 .

It is a cyclic number.

It is not a de Polignac number, because 520442173 - 2¹³ = 520433981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520442177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260221086 + 260221087.

It is an arithmetic number, because the mean of its divisors is an integer number (260221087).

Almost surely, 2^520442173 is an apocalyptic number.

It is an amenable number.

520442173 is a deficient number, since it is larger than the sum of its proper divisors (1).

520442173 is an equidigital number, since it uses as much as digits as its factorization.

520442173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 520442173 is about 22813.2017261935. The cubic root of 520442173 is about 804.3730174467.

Adding to 520442173 its reverse (371244025), we get a palindrome (891686198).

The spelling of 520442173 in words is "five hundred twenty million, four hundred forty-two thousand, one hundred seventy-three".