1222163557 has 2 divisors, whose sum is σ = 1222163558. Its totient is φ = 1222163556.

The previous prime is 1222163533. The next prime is 1222163567. The reversal of 1222163557 is 7553612221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1200345316 + 21818241 = 34646^2 + 4671^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222163557 - 2²⁷ = 1087945829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222163567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611081778 + 611081779.

It is an arithmetic number, because the mean of its divisors is an integer number (611081779).

Almost surely, 2^1222163557 is an apocalyptic number.

It is an amenable number.

1222163557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222163557 is an equidigital number, since it uses as much as digits as its factorization.

1222163557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 34.

The square root of 1222163557 is about 34959.4559025166. The cubic root of 1222163557 is about 1069.1610032963.

Adding to 1222163557 its reverse (7553612221), we get a palindrome (8775775778).

The spelling of 1222163557 in words is "one billion, two hundred twenty-two million, one hundred sixty-three thousand, five hundred fifty-seven".