11531227065 has 16 divisors (see below), whose sum is σ = 18632638656. Its totient is φ = 6089096000.

The previous prime is 11531227027. The next prime is 11531227069. The reversal of 11531227065 is 56072213511.

It is not a de Polignac number, because 11531227065 - 2⁸ = 11531226809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11531227069) 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 in 15 ways as a sum of consecutive naturals, for example, 3804171 + ... + 3807200.

It is an arithmetic number, because the mean of its divisors is an integer number (1164539916).

Almost surely, 2^11531227065 is an apocalyptic number.

11531227065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11531227065 is a deficient number, since it is larger than the sum of its proper divisors (7101411591).

11531227065 is a wasteful number, since it uses less digits than its factorization.

11531227065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7611480.

The product of its (nonzero) digits is 12600, while the sum is 33.

The spelling of 11531227065 in words is "eleven billion, five hundred thirty-one million, two hundred twenty-seven thousand, sixty-five".