2218126769 has 2 divisors, whose sum is σ = 2218126770. Its totient is φ = 2218126768.

The previous prime is 2218126759. The next prime is 2218126843. The reversal of 2218126769 is 9676218122.

It is a happy number.

2218126769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1287876769 + 930250000 = 35887^2 + 30500^2 .

It is a cyclic number.

It is not a de Polignac number, because 2218126769 - 2⁴ = 2218126753 is a prime.

It is a super-2 number, since 2×2218126769² = 9840172726708758722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2218126759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109063384 + 1109063385.

It is an arithmetic number, because the mean of its divisors is an integer number (1109063385).

Almost surely, 2^2218126769 is an apocalyptic number.

It is an amenable number.

2218126769 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218126769 is an equidigital number, since it uses as much as digits as its factorization.

2218126769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 2218126769 is about 47096.9932055115. The cubic root of 2218126769 is about 1304.1537295472.

The spelling of 2218126769 in words is "two billion, two hundred eighteen million, one hundred twenty-six thousand, seven hundred sixty-nine".