520356641 has 16 divisors (see below), whose sum is σ = 612032256. Its totient is φ = 433066176.

The previous prime is 520356637. The next prime is 520356659. The reversal of 520356641 is 146653025.

It is a cyclic number.

It is not a de Polignac number, because 520356641 - 2² = 520356637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 520356598 and 520356607.

It is not an unprimeable number, because it can be changed into a prime (520356601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142460 + ... + 146066.

It is an arithmetic number, because the mean of its divisors is an integer number (38252016).

Almost surely, 2^520356641 is an apocalyptic number.

It is an amenable number.

520356641 is a deficient number, since it is larger than the sum of its proper divisors (91675615).

520356641 is a wasteful number, since it uses less digits than its factorization.

520356641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4208.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 520356641 is about 22811.3270328580. The cubic root of 520356641 is about 804.3289501736.

The spelling of 520356641 in words is "five hundred twenty million, three hundred fifty-six thousand, six hundred forty-one".