1222355549 has 2 divisors, whose sum is σ = 1222355550. Its totient is φ = 1222355548.

The previous prime is 1222355531. The next prime is 1222355567. The reversal of 1222355549 is 9455532221.

It is a balanced prime because it is at equal distance from previous prime (1222355531) and next prime (1222355567).

It can be written as a sum of positive squares in only one way, i.e., 787924900 + 434430649 = 28070^2 + 20843^2 .

It is an emirp because it is prime and its reverse (9455532221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222355549 - 2⁸ = 1222355293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222355579) 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, 611177774 + 611177775.

It is an arithmetic number, because the mean of its divisors is an integer number (611177775).

Almost surely, 2^1222355549 is an apocalyptic number.

It is an amenable number.

1222355549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222355549 is an equidigital number, since it uses as much as digits as its factorization.

1222355549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108000, while the sum is 38.

The square root of 1222355549 is about 34962.2017184273. The cubic root of 1222355549 is about 1069.2169858775.

The spelling of 1222355549 in words is "one billion, two hundred twenty-two million, three hundred fifty-five thousand, five hundred forty-nine".