222226813 has 2 divisors, whose sum is σ = 222226814. Its totient is φ = 222226812.

The previous prime is 222226811. The next prime is 222226853. The reversal of 222226813 is 318622222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130028409 + 92198404 = 11403^2 + 9602^2 .

It is a cyclic number.

It is not a de Polignac number, because 222226813 - 2¹ = 222226811 is a prime.

It is a super-2 number, since 2×222226813² = 98769512832273938, which contains 22 as substring.

Together with 222226811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222226811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111113406 + 111113407.

It is an arithmetic number, because the mean of its divisors is an integer number (111113407).

Almost surely, 2^222226813 is an apocalyptic number.

It is an amenable number.

222226813 is a deficient number, since it is larger than the sum of its proper divisors (1).

222226813 is an equidigital number, since it uses as much as digits as its factorization.

222226813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 28.

The square root of 222226813 is about 14907.2738285711. The cubic root of 222226813 is about 605.7110352471.

The spelling of 222226813 in words is "two hundred twenty-two million, two hundred twenty-six thousand, eight hundred thirteen".