520355042221 has 16 divisors (see below), whose sum is σ = 600757256448. Its totient is φ = 441471888000.

The previous prime is 520355042201. The next prime is 520355042237. The reversal of 520355042221 is 122240553025.

It is a cyclic number.

It is not a de Polignac number, because 520355042221 - 2⁹ = 520355041709 is a prime.

It is a super-2 number, since 2×520355042221² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520355042201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2319936 + ... + 2534326.

It is an arithmetic number, because the mean of its divisors is an integer number (37547328528).

Almost surely, 2^520355042221 is an apocalyptic number.

It is an amenable number.

520355042221 is a deficient number, since it is larger than the sum of its proper divisors (80402214227).

520355042221 is a wasteful number, since it uses less digits than its factorization.

520355042221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217932.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 520355042221 its reverse (122240553025), we get a palindrome (642595595246).

The spelling of 520355042221 in words is "five hundred twenty billion, three hundred fifty-five million, forty-two thousand, two hundred twenty-one".