520522393 has 2 divisors, whose sum is σ = 520522394. Its totient is φ = 520522392.

The previous prime is 520522391. The next prime is 520522427. The reversal of 520522393 is 393225025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 402082704 + 118439689 = 20052^2 + 10883^2 .

It is a cyclic number.

It is not a de Polignac number, because 520522393 - 2¹ = 520522391 is a prime.

It is a super-2 number, since 2×520522393² = 541887123228892898, which contains 22 as substring.

Together with 520522391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (520522391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260261196 + 260261197.

It is an arithmetic number, because the mean of its divisors is an integer number (260261197).

Almost surely, 2^520522393 is an apocalyptic number.

It is an amenable number.

520522393 is a deficient number, since it is larger than the sum of its proper divisors (1).

520522393 is an equidigital number, since it uses as much as digits as its factorization.

520522393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 520522393 is about 22814.9598509399. The cubic root of 520522393 is about 804.4143435163.

It can be divided in two parts, 52052 and 2393, that added together give a palindrome (54445).

The spelling of 520522393 in words is "five hundred twenty million, five hundred twenty-two thousand, three hundred ninety-three".