1222345557 has 12 divisors (see below), whose sum is σ = 1842376224. Its totient is φ = 779466600.

The previous prime is 1222345529. The next prime is 1222345573. The reversal of 1222345557 is 7555432221.

It is not a de Polignac number, because 1222345557 - 2¹⁰ = 1222344533 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222345517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2952319 + ... + 2952732.

It is an arithmetic number, because the mean of its divisors is an integer number (153531352).

Almost surely, 2^1222345557 is an apocalyptic number.

It is an amenable number.

1222345557 is a deficient number, since it is larger than the sum of its proper divisors (620030667).

1222345557 is a wasteful number, since it uses less digits than its factorization.

1222345557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5905080 (or 5905077 counting only the distinct ones).

The product of its digits is 84000, while the sum is 36.

The square root of 1222345557 is about 34962.0588209562. The cubic root of 1222345557 is about 1069.2140724739.

Adding to 1222345557 its reverse (7555432221), we get a palindrome (8777777778).

The spelling of 1222345557 in words is "one billion, two hundred twenty-two million, three hundred forty-five thousand, five hundred fifty-seven".