2247351221 has 2 divisors, whose sum is σ = 2247351222. Its totient is φ = 2247351220.

The previous prime is 2247351199. The next prime is 2247351247. The reversal of 2247351221 is 1221537422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2245432996 + 1918225 = 47386^2 + 1385^2 .

It is a cyclic number.

It is not a de Polignac number, because 2247351221 - 2¹⁸ = 2247089077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2247353221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1123675610 + 1123675611.

It is an arithmetic number, because the mean of its divisors is an integer number (1123675611).

Almost surely, 2^2247351221 is an apocalyptic number.

It is an amenable number.

2247351221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2247351221 is an equidigital number, since it uses as much as digits as its factorization.

2247351221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 2247351221 is about 47406.2360982181. The cubic root of 2247351221 is about 1309.8562903947.

Adding to 2247351221 its reverse (1221537422), we get a palindrome (3468888643).

The spelling of 2247351221 in words is "two billion, two hundred forty-seven million, three hundred fifty-one thousand, two hundred twenty-one".