5222222221 has 2 divisors, whose sum is σ = 5222222222. Its totient is φ = 5222222220.

The previous prime is 5222222209. The next prime is 5222222233. The reversal of 5222222221 is 1222222225.

It is a balanced prime because it is at equal distance from previous prime (5222222209) and next prime (5222222233).

It can be written as a sum of positive squares in only one way, i.e., 3763822500 + 1458399721 = 61350^2 + 38189^2 .

It is a cyclic number.

It is not a de Polignac number, because 5222222221 - 2¹³ = 5222214029 is a prime.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 5222222192 and 5222222201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5222226221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2611111110 + 2611111111.

It is an arithmetic number, because the mean of its divisors is an integer number (2611111111).

Almost surely, 2^5222222221 is an apocalyptic number.

It is an amenable number.

5222222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5222222221 is an equidigital number, since it uses as much as digits as its factorization.

5222222221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1280, while the sum is 22.

The square root of 5222222221 is about 72264.9446204728. The cubic root of 5222222221 is about 1734.9426209961.

Adding to 5222222221 its reverse (1222222225), we get a palindrome (6444444446).

The spelling of 5222222221 in words is "five billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-one".