5205221621643 has 8 divisors (see below), whose sum is σ = 6940319855248. Its totient is φ = 3470135567904.

The previous prime is 5205221621599. The next prime is 5205221621651. The reversal of 5205221621643 is 3461261225025.

5205221621643 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5205221621643 - 2¹³ = 5205221613451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5205221621693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1996180 + ... + 3794097.

It is an arithmetic number, because the mean of its divisors is an integer number (867539981906).

Almost surely, 2^{5205221621643} is an apocalyptic number.

5205221621643 is a deficient number, since it is larger than the sum of its proper divisors (1735098233605).

5205221621643 is a wasteful number, since it uses less digits than its factorization.

5205221621643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6089933.

The product of its (nonzero) digits is 172800, while the sum is 39.

Adding to 5205221621643 its reverse (3461261225025), we get a palindrome (8666482846668).

The spelling of 5205221621643 in words is "five trillion, two hundred five billion, two hundred twenty-one million, six hundred twenty-one thousand, six hundred forty-three".