1313222543 has 2 divisors, whose sum is σ = 1313222544. Its totient is φ = 1313222542.

The previous prime is 1313222509. The next prime is 1313222549. The reversal of 1313222543 is 3452223131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1313222543 - 2¹⁸ = 1312960399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313222549) 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, 656611271 + 656611272.

It is an arithmetic number, because the mean of its divisors is an integer number (656611272).

Almost surely, 2^1313222543 is an apocalyptic number.

1313222543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313222543 is an equidigital number, since it uses as much as digits as its factorization.

1313222543 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 1313222543 is about 36238.4125342157. The cubic root of 1313222543 is about 1095.0806618228.

Adding to 1313222543 its reverse (3452223131), we get a palindrome (4765445674).

The spelling of 1313222543 in words is "one billion, three hundred thirteen million, two hundred twenty-two thousand, five hundred forty-three".