1115540557 has 2 divisors, whose sum is σ = 1115540558. Its totient is φ = 1115540556.

The previous prime is 1115540551. The next prime is 1115540563. The reversal of 1115540557 is 7550455111.

It is a balanced prime because it is at equal distance from previous prime (1115540551) and next prime (1115540563).

It can be written as a sum of positive squares in only one way, i.e., 764577801 + 350962756 = 27651^2 + 18734^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115540557 - 2⁷ = 1115540429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115540551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557770278 + 557770279.

It is an arithmetic number, because the mean of its divisors is an integer number (557770279).

Almost surely, 2^1115540557 is an apocalyptic number.

It is an amenable number.

1115540557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115540557 is an equidigital number, since it uses as much as digits as its factorization.

1115540557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17500, while the sum is 34.

The square root of 1115540557 is about 33399.7089358575. The cubic root of 1115540557 is about 1037.1186755998.

Adding to 1115540557 its reverse (7550455111), we get a palindrome (8665995668).

The spelling of 1115540557 in words is "one billion, one hundred fifteen million, five hundred forty thousand, five hundred fifty-seven".