1223245181 has 2 divisors, whose sum is σ = 1223245182. Its totient is φ = 1223245180.

The previous prime is 1223245169. The next prime is 1223245187. The reversal of 1223245181 is 1815423221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 894548281 + 328696900 = 29909^2 + 18130^2 .

It is an emirp because it is prime and its reverse (1815423221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1223245181 - 2⁶ = 1223245117 is a prime.

It is a super-2 number, since 2×1223245181² = 2992657545679445522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223245187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611622590 + 611622591.

It is an arithmetic number, because the mean of its divisors is an integer number (611622591).

Almost surely, 2^1223245181 is an apocalyptic number.

It is an amenable number.

1223245181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223245181 is an equidigital number, since it uses as much as digits as its factorization.

1223245181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 29.

The square root of 1223245181 is about 34974.9221728941. The cubic root of 1223245181 is about 1069.4763154906.

The spelling of 1223245181 in words is "one billion, two hundred twenty-three million, two hundred forty-five thousand, one hundred eighty-one".