11505143233 has 12 divisors (see below), whose sum is σ = 12009487360. Its totient is φ = 11020844016.

The previous prime is 11505143203. The next prime is 11505143239. The reversal of 11505143233 is 33234150511.

It is a happy number.

It is not a de Polignac number, because 11505143233 - 2¹³ = 11505135041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11505143239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52948 + ... + 160666.

Almost surely, 2^11505143233 is an apocalyptic number.

It is an amenable number.

11505143233 is a deficient number, since it is larger than the sum of its proper divisors (504344127).

11505143233 is a wasteful number, since it uses less digits than its factorization.

11505143233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107904 (or 107875 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 11505143233 its reverse (33234150511), we get a palindrome (44739293744).

The spelling of 11505143233 in words is "eleven billion, five hundred five million, one hundred forty-three thousand, two hundred thirty-three".