1220322563 has 2 divisors, whose sum is σ = 1220322564. Its totient is φ = 1220322562.

The previous prime is 1220322541. The next prime is 1220322583. The reversal of 1220322563 is 3652230221.

It is a strong prime.

It is an emirp because it is prime and its reverse (3652230221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220322563 - 2¹⁰ = 1220321539 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220322583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610161281 + 610161282.

It is an arithmetic number, because the mean of its divisors is an integer number (610161282).

Almost surely, 2^1220322563 is an apocalyptic number.

1220322563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220322563 is an equidigital number, since it uses as much as digits as its factorization.

1220322563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 1220322563 is about 34933.1155638887. The cubic root of 1220322563 is about 1068.6238934777.

Adding to 1220322563 its reverse (3652230221), we get a palindrome (4872552784).

The spelling of 1220322563 in words is "one billion, two hundred twenty million, three hundred twenty-two thousand, five hundred sixty-three".