1223455559 has 2 divisors, whose sum is σ = 1223455560. Its totient is φ = 1223455558.

The previous prime is 1223455553. The next prime is 1223455591. The reversal of 1223455559 is 9555543221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223455559 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223455553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611727779 + 611727780.

It is an arithmetic number, because the mean of its divisors is an integer number (611727780).

Almost surely, 2^1223455559 is an apocalyptic number.

1223455559 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223455559 is an equidigital number, since it uses as much as digits as its factorization.

1223455559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270000, while the sum is 41.

The square root of 1223455559 is about 34977.9295985340. The cubic root of 1223455559 is about 1069.5376227397.

The spelling of 1223455559 in words is "one billion, two hundred twenty-three million, four hundred fifty-five thousand, five hundred fifty-nine".