1223217043 has 2 divisors, whose sum is σ = 1223217044. Its totient is φ = 1223217042.

The previous prime is 1223216999. The next prime is 1223217089. The reversal of 1223217043 is 3407123221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223217043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223216999 and 1223217017.

It is not a weakly prime, because it can be changed into another prime (1223217943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611608521 + 611608522.

It is an arithmetic number, because the mean of its divisors is an integer number (611608522).

Almost surely, 2^1223217043 is an apocalyptic number.

1223217043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223217043 is an equidigital number, since it uses as much as digits as its factorization.

1223217043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 1223217043 is about 34974.5199109294. The cubic root of 1223217043 is about 1069.4681151299.

The spelling of 1223217043 in words is "one billion, two hundred twenty-three million, two hundred seventeen thousand, forty-three".