5218785028221 has 16 divisors (see below), whose sum is σ = 6976426765824. Its totient is φ = 3470178146864.

The previous prime is 5218785028157. The next prime is 5218785028241. The reversal of 5218785028221 is 1228205878125.

It is a cyclic number.

It is not a de Polignac number, because 5218785028221 - 2⁶ = 5218785028157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5218785028241) 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, 381730 + ... + 3253196.

It is an arithmetic number, because the mean of its divisors is an integer number (436026672864).

Almost surely, 2^{5218785028221} is an apocalyptic number.

It is an amenable number.

5218785028221 is a deficient number, since it is larger than the sum of its proper divisors (1757641737603).

5218785028221 is a wasteful number, since it uses less digits than its factorization.

5218785028221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2873040.

The product of its (nonzero) digits is 1433600, while the sum is 51.

The spelling of 5218785028221 in words is "five trillion, two hundred eighteen billion, seven hundred eighty-five million, twenty-eight thousand, two hundred twenty-one".