211222226 has 4 divisors (see below), whose sum is σ = 316833342. Its totient is φ = 105611112.

The previous prime is 211222223. The next prime is 211222237. The reversal of 211222226 is 622222112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 188650225 + 22572001 = 13735^2 + 4751^2 .

It is a super-2 number, since 2×211222226² = 89229657512790152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211222198 and 211222207.

It is not an unprimeable number, because it can be changed into a prime (211222223) 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, 52805555 + ... + 52805558.

Almost surely, 2^211222226 is an apocalyptic number.

211222226 is a deficient number, since it is larger than the sum of its proper divisors (105611116).

211222226 is a wasteful number, since it uses less digits than its factorization.

211222226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105611115.

The product of its digits is 384, while the sum is 20.

The square root of 211222226 is about 14533.4863676958. The cubic root of 211222226 is about 595.5431107216.

Adding to 211222226 its reverse (622222112), we get a palindrome (833444338).

The spelling of 211222226 in words is "two hundred eleven million, two hundred twenty-two thousand, two hundred twenty-six".