222186469 has 2 divisors, whose sum is σ = 222186470. Its totient is φ = 222186468.

The previous prime is 222186457. The next prime is 222186479. The reversal of 222186469 is 964681222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153512100 + 68674369 = 12390^2 + 8287^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222186469 is a prime.

It is a super-2 number, since 2×222186469² = 98733654013375922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222186439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111093234 + 111093235.

It is an arithmetic number, because the mean of its divisors is an integer number (111093235).

Almost surely, 2^222186469 is an apocalyptic number.

It is an amenable number.

222186469 is a deficient number, since it is larger than the sum of its proper divisors (1).

222186469 is an equidigital number, since it uses as much as digits as its factorization.

222186469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 40.

The square root of 222186469 is about 14905.9206022305. The cubic root of 222186469 is about 605.6743785769.

The spelling of 222186469 in words is "two hundred twenty-two million, one hundred eighty-six thousand, four hundred sixty-nine".