1222220158 has 4 divisors (see below), whose sum is σ = 1833330240. Its totient is φ = 611110078.

The previous prime is 1222220141. The next prime is 1222220159. The reversal of 1222220158 is 8510222221.

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

It is a super-2 number, since 2×1222220158² = 2987644229243089928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222220159) 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, 305555038 + ... + 305555041.

It is an arithmetic number, because the mean of its divisors is an integer number (458332560).

Almost surely, 2^1222220158 is an apocalyptic number.

1222220158 is a deficient number, since it is larger than the sum of its proper divisors (611110082).

1222220158 is an equidigital number, since it uses as much as digits as its factorization.

1222220158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611110081.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 1222220158 is about 34960.2654166126. The cubic root of 1222220158 is about 1069.1775080834.

Adding to 1222220158 its reverse (8510222221), we get a palindrome (9732442379).

The spelling of 1222220158 in words is "one billion, two hundred twenty-two million, two hundred twenty thousand, one hundred fifty-eight".