1222273813 has 2 divisors, whose sum is σ = 1222273814. Its totient is φ = 1222273812.

The previous prime is 1222273777. The next prime is 1222273847. The reversal of 1222273813 is 3183722221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1163014609 + 59259204 = 34103^2 + 7698^2 .

It is an emirp because it is prime and its reverse (3183722221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222273813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222273513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611136906 + 611136907.

It is an arithmetic number, because the mean of its divisors is an integer number (611136907).

Almost surely, 2^1222273813 is an apocalyptic number.

It is an amenable number.

1222273813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222273813 is an equidigital number, since it uses as much as digits as its factorization.

1222273813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 31.

The square root of 1222273813 is about 34961.0327793674. The cubic root of 1222273813 is about 1069.1931533498.

The spelling of 1222273813 in words is "one billion, two hundred twenty-two million, two hundred seventy-three thousand, eight hundred thirteen".