222128369 has 2 divisors, whose sum is σ = 222128370. Its totient is φ = 222128368.

The previous prime is 222128339. The next prime is 222128381. The reversal of 222128369 is 963821222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155950144 + 66178225 = 12488^2 + 8135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222128369 is a prime.

It is a super-2 number, since 2×222128369² = 98682024629200322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (222128339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111064184 + 111064185.

It is an arithmetic number, because the mean of its divisors is an integer number (111064185).

Almost surely, 2^222128369 is an apocalyptic number.

It is an amenable number.

222128369 is a deficient number, since it is larger than the sum of its proper divisors (1).

222128369 is an equidigital number, since it uses as much as digits as its factorization.

222128369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 222128369 is about 14903.9715847824. The cubic root of 222128369 is about 605.6215809587.

The spelling of 222128369 in words is "two hundred twenty-two million, one hundred twenty-eight thousand, three hundred sixty-nine".