1225154443 has 2 divisors, whose sum is σ = 1225154444. Its totient is φ = 1225154442.

The previous prime is 1225154431. The next prime is 1225154461. The reversal of 1225154443 is 3444515221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1225154443 - 2⁹ = 1225153931 is a prime.

It is not a weakly prime, because it can be changed into another prime (1225154473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612577221 + 612577222.

It is an arithmetic number, because the mean of its divisors is an integer number (612577222).

Almost surely, 2^1225154443 is an apocalyptic number.

1225154443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225154443 is an equidigital number, since it uses as much as digits as its factorization.

1225154443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19200, while the sum is 31.

The square root of 1225154443 is about 35002.2062590346. The cubic root of 1225154443 is about 1070.0324452269.

Adding to 1225154443 its reverse (3444515221), we get a palindrome (4669669664).

The spelling of 1225154443 in words is "one billion, two hundred twenty-five million, one hundred fifty-four thousand, four hundred forty-three".