11543431001 has 16 divisors (see below), whose sum is σ = 12268972800. Its totient is φ = 10823152128.

The previous prime is 11543430991. The next prime is 11543431021. The reversal of 11543431001 is 10013434511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11543431001 - 2⁶ = 11543430937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11543431021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7173485 + ... + 7175093.

It is an arithmetic number, because the mean of its divisors is an integer number (766810800).

Almost surely, 2^11543431001 is an apocalyptic number.

It is an amenable number.

11543431001 is a deficient number, since it is larger than the sum of its proper divisors (725541799).

11543431001 is a wasteful number, since it uses less digits than its factorization.

11543431001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2968.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 11543431001 its reverse (10013434511), we get a palindrome (21556865512).

The spelling of 11543431001 in words is "eleven billion, five hundred forty-three million, four hundred thirty-one thousand, one".