1315211543 has 2 divisors, whose sum is σ = 1315211544. Its totient is φ = 1315211542.

The previous prime is 1315211537. The next prime is 1315211551. The reversal of 1315211543 is 3451125131.

It is a weak prime.

It is an emirp because it is prime and its reverse (3451125131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1315211543 - 2¹² = 1315207447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1315217543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657605771 + 657605772.

It is an arithmetic number, because the mean of its divisors is an integer number (657605772).

Almost surely, 2^1315211543 is an apocalyptic number.

1315211543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315211543 is an equidigital number, since it uses as much as digits as its factorization.

1315211543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 26.

The square root of 1315211543 is about 36265.8454058361. The cubic root of 1315211543 is about 1095.6332507495.

Adding to 1315211543 its reverse (3451125131), we get a palindrome (4766336674).

The spelling of 1315211543 in words is "one billion, three hundred fifteen million, two hundred eleven thousand, five hundred forty-three".