2221115251 has 2 divisors, whose sum is σ = 2221115252. Its totient is φ = 2221115250.

The previous prime is 2221115209. The next prime is 2221115293. The reversal of 2221115251 is 1525111222.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (2221115209) and next prime (2221115293).

It is a cyclic number.

It is not a de Polignac number, because 2221115251 - 2²⁵ = 2187560819 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221115201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110557625 + 1110557626.

It is an arithmetic number, because the mean of its divisors is an integer number (1110557626).

Almost surely, 2^2221115251 is an apocalyptic number.

2221115251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221115251 is an equidigital number, since it uses as much as digits as its factorization.

2221115251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 400, while the sum is 22.

The square root of 2221115251 is about 47128.7094136897. The cubic root of 2221115251 is about 1304.7391621096.

Adding to 2221115251 its reverse (1525111222), we get a palindrome (3746226473).

The spelling of 2221115251 in words is "two billion, two hundred twenty-one million, one hundred fifteen thousand, two hundred fifty-one".