1222257219 has 4 divisors (see below), whose sum is σ = 1629676296. Its totient is φ = 814838144.

The previous prime is 1222257209. The next prime is 1222257247. The reversal of 1222257219 is 9127522221.

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

It is a cyclic number.

It is not a de Polignac number, because 1222257219 - 2²⁵ = 1188702787 is a prime.

It is a super-2 number, since 2×1222257219² = 2987825418795227922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1222257219.

It is not an unprimeable number, because it can be changed into a prime (1222257209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203709534 + ... + 203709539.

It is an arithmetic number, because the mean of its divisors is an integer number (407419074).

Almost surely, 2^1222257219 is an apocalyptic number.

1222257219 is a deficient number, since it is larger than the sum of its proper divisors (407419077).

1222257219 is an equidigital number, since it uses as much as digits as its factorization.

1222257219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407419076.

The product of its digits is 10080, while the sum is 33.

The square root of 1222257219 is about 34960.7954571975. The cubic root of 1222257219 is about 1069.1883147527.

The spelling of 1222257219 in words is "one billion, two hundred twenty-two million, two hundred fifty-seven thousand, two hundred nineteen".