11500387331 has 2 divisors, whose sum is σ = 11500387332. Its totient is φ = 11500387330.

The previous prime is 11500387319. The next prime is 11500387357. The reversal of 11500387331 is 13378300511.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11500387331 is a prime.

It is a super-2 number, since 2×11500387331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11500387361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5750193665 + 5750193666.

It is an arithmetic number, because the mean of its divisors is an integer number (5750193666).

Almost surely, 2^11500387331 is an apocalyptic number.

11500387331 is a deficient number, since it is larger than the sum of its proper divisors (1).

11500387331 is an equidigital number, since it uses as much as digits as its factorization.

11500387331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

Adding to 11500387331 its reverse (13378300511), we get a palindrome (24878687842).

The spelling of 11500387331 in words is "eleven billion, five hundred million, three hundred eighty-seven thousand, three hundred thirty-one".