2229449221 has 2 divisors, whose sum is σ = 2229449222. Its totient is φ = 2229449220.

The previous prime is 2229449213. The next prime is 2229449249. The reversal of 2229449221 is 1229449222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1322776900 + 906672321 = 36370^2 + 30111^2 .

It is a cyclic number.

It is not a de Polignac number, because 2229449221 - 2³ = 2229449213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2229449281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1114724610 + 1114724611.

It is an arithmetic number, because the mean of its divisors is an integer number (1114724611).

Almost surely, 2^2229449221 is an apocalyptic number.

It is an amenable number.

2229449221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2229449221 is an equidigital number, since it uses as much as digits as its factorization.

2229449221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 2229449221 is about 47217.0437554068. The cubic root of 2229449221 is about 1306.3689868001.

Subtracting from 2229449221 its reverse (1229449222), we obtain a palindrome (999999999).

The spelling of 2229449221 in words is "two billion, two hundred twenty-nine million, four hundred forty-nine thousand, two hundred twenty-one".