5221055621 has 2 divisors, whose sum is σ = 5221055622. Its totient is φ = 5221055620.

The previous prime is 5221055563. The next prime is 5221055627. The reversal of 5221055621 is 1265501225.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4535349025 + 685706596 = 67345^2 + 26186^2 .

It is a cyclic number.

It is not a de Polignac number, because 5221055621 - 2¹⁴ = 5221039237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5221055627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2610527810 + 2610527811.

It is an arithmetic number, because the mean of its divisors is an integer number (2610527811).

Almost surely, 2^5221055621 is an apocalyptic number.

It is an amenable number.

5221055621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5221055621 is an equidigital number, since it uses as much as digits as its factorization.

5221055621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 5221055621 is about 72256.8724828303. The cubic root of 5221055621 is about 1734.8134209028.

Adding to 5221055621 its reverse (1265501225), we get a palindrome (6486556846).

The spelling of 5221055621 in words is "five billion, two hundred twenty-one million, fifty-five thousand, six hundred twenty-one".