1225554443 has 2 divisors, whose sum is σ = 1225554444. Its totient is φ = 1225554442.

The previous prime is 1225554433. The next prime is 1225554509. The reversal of 1225554443 is 3444555221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1225554443 - 2¹⁶ = 1225488907 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1225554433) 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, 612777221 + 612777222.

It is an arithmetic number, because the mean of its divisors is an integer number (612777222).

Almost surely, 2^1225554443 is an apocalyptic number.

1225554443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225554443 is an equidigital number, since it uses as much as digits as its factorization.

1225554443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96000, while the sum is 35.

The square root of 1225554443 is about 35007.9197182580. The cubic root of 1225554443 is about 1070.1488839906.

The spelling of 1225554443 in words is "one billion, two hundred twenty-five million, five hundred fifty-four thousand, four hundred forty-three".