520240650406221 has 64 divisors (see below), whose sum is σ = 731208827068416. Its totient is φ = 328736693376000.

The previous prime is 520240650406157. The next prime is 520240650406247. The reversal of 520240650406221 is 122604056042025.

It is not a de Polignac number, because 520240650406221 - 2⁶ = 520240650406157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 520240650406221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520240650405221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 144986430 + ... + 148531296.

It is an arithmetic number, because the mean of its divisors is an integer number (11425137922944).

Almost surely, 2^{520240650406221} is an apocalyptic number.

It is an amenable number.

520240650406221 is a deficient number, since it is larger than the sum of its proper divisors (210968176662195).

520240650406221 is a wasteful number, since it uses less digits than its factorization.

520240650406221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3545242.

The product of its (nonzero) digits is 230400, while the sum is 39.

The spelling of 520240650406221 in words is "five hundred twenty trillion, two hundred forty billion, six hundred fifty million, four hundred six thousand, two hundred twenty-one".