1315555543 has 2 divisors, whose sum is σ = 1315555544. Its totient is φ = 1315555542.

The previous prime is 1315555531. The next prime is 1315555583. The reversal of 1315555543 is 3455555131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1315555543 - 2²⁵ = 1282001111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1315555583) 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, 657777771 + 657777772.

It is an arithmetic number, because the mean of its divisors is an integer number (657777772).

Almost surely, 2^1315555543 is an apocalyptic number.

1315555543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315555543 is an equidigital number, since it uses as much as digits as its factorization.

1315555543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112500, while the sum is 37.

The square root of 1315555543 is about 36270.5878502127. The cubic root of 1315555543 is about 1095.7287651644.

The spelling of 1315555543 in words is "one billion, three hundred fifteen million, five hundred fifty-five thousand, five hundred forty-three".