1311255233 has 2 divisors, whose sum is σ = 1311255234. Its totient is φ = 1311255232.

The previous prime is 1311255223. The next prime is 1311255259. The reversal of 1311255233 is 3325521131.

It is an a-pointer prime, because the next prime (1311255259) can be obtained adding 1311255233 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1032465424 + 278789809 = 32132^2 + 16697^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311255233 - 2⁴ = 1311255217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1311255223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655627616 + 655627617.

It is an arithmetic number, because the mean of its divisors is an integer number (655627617).

Almost surely, 2^1311255233 is an apocalyptic number.

It is an amenable number.

1311255233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311255233 is an equidigital number, since it uses as much as digits as its factorization.

1311255233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 26.

The square root of 1311255233 is about 36211.2583736053. The cubic root of 1311255233 is about 1094.5335497216.

Adding to 1311255233 its reverse (3325521131), we get a palindrome (4636776364).

The spelling of 1311255233 in words is "one billion, three hundred eleven million, two hundred fifty-five thousand, two hundred thirty-three".