1115523137 has 2 divisors, whose sum is σ = 1115523138. Its totient is φ = 1115523136.

The previous prime is 1115523131. The next prime is 1115523139. The reversal of 1115523137 is 7313255111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 978188176 + 137334961 = 31276^2 + 11719^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115523137 - 2¹⁰ = 1115522113 is a prime.

Together with 1115523139, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1115523131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557761568 + 557761569.

It is an arithmetic number, because the mean of its divisors is an integer number (557761569).

Almost surely, 2^1115523137 is an apocalyptic number.

It is an amenable number.

1115523137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115523137 is an equidigital number, since it uses as much as digits as its factorization.

1115523137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3150, while the sum is 29.

The square root of 1115523137 is about 33399.4481541237. The cubic root of 1115523137 is about 1037.1132771105.

Adding to 1115523137 its reverse (7313255111), we get a palindrome (8428778248).

The spelling of 1115523137 in words is "one billion, one hundred fifteen million, five hundred twenty-three thousand, one hundred thirty-seven".