1223435231 has 2 divisors, whose sum is σ = 1223435232. Its totient is φ = 1223435230.

The previous prime is 1223435219. The next prime is 1223435263. The reversal of 1223435231 is 1325343221.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1325343221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223435231 is a prime.

It is a super-2 number, since 2×1223435231² = 2993587528904046722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1223435231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223435201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611717615 + 611717616.

It is an arithmetic number, because the mean of its divisors is an integer number (611717616).

Almost surely, 2^1223435231 is an apocalyptic number.

1223435231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223435231 is an equidigital number, since it uses as much as digits as its factorization.

1223435231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 26.

The square root of 1223435231 is about 34977.6390140901. The cubic root of 1223435231 is about 1069.5316991678.

Adding to 1223435231 its reverse (1325343221), we get a palindrome (2548778452).

The spelling of 1223435231 in words is "one billion, two hundred twenty-three million, four hundred thirty-five thousand, two hundred thirty-one".