1122225581 has 2 divisors, whose sum is σ = 1122225582. Its totient is φ = 1122225580.

The previous prime is 1122225571. The next prime is 1122225649. The reversal of 1122225581 is 1855222211.

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., 725817481 + 396408100 = 26941^2 + 19910^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122225581 - 2²⁶ = 1055116717 is a prime.

It is a super-2 number, since 2×1122225581² = 2518780509301575122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1122225541) 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, 561112790 + 561112791.

It is an arithmetic number, because the mean of its divisors is an integer number (561112791).

Almost surely, 2^1122225581 is an apocalyptic number.

It is an amenable number.

1122225581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122225581 is an equidigital number, since it uses as much as digits as its factorization.

1122225581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3200, while the sum is 29.

The square root of 1122225581 is about 33499.6355353308. The cubic root of 1122225581 is about 1039.1862412057.

Adding to 1122225581 its reverse (1855222211), we get a palindrome (2977447792).

The spelling of 1122225581 in words is "one billion, one hundred twenty-two million, two hundred twenty-five thousand, five hundred eighty-one".