520522401 has 16 divisors (see below), whose sum is σ = 814615424. Its totient is φ = 289401984.

The previous prime is 520522393. The next prime is 520522427. The reversal of 520522401 is 104225025.

It is a happy number.

It is not a de Polignac number, because 520522401 - 2³ = 520522393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (520522451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334180 + ... + 335733.

It is an arithmetic number, because the mean of its divisors is an integer number (50913464).

Almost surely, 2^520522401 is an apocalyptic number.

It is an amenable number.

520522401 is a deficient number, since it is larger than the sum of its proper divisors (294093023).

520522401 is a wasteful number, since it uses less digits than its factorization.

520522401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669960.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 520522401 is about 22814.9600262635. The cubic root of 520522401 is about 804.4143476374.

Adding to 520522401 its reverse (104225025), we get a palindrome (624747426).

The spelling of 520522401 in words is "five hundred twenty million, five hundred twenty-two thousand, four hundred one".