11543432551231 has 4 divisors (see below), whose sum is σ = 13192494344272. Its totient is φ = 9894370758192.

The previous prime is 11543432551201. The next prime is 11543432551243. The reversal of 11543432551231 is 13215523434511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11543432551231 - 2⁵ = 11543432551199 is a prime.

It is a super-2 number, since 2×11543432551231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11543432551201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824530896510 + ... + 824530896523.

It is an arithmetic number, because the mean of its divisors is an integer number (3298123586068).

Almost surely, 2^{11543432551231} is an apocalyptic number.

11543432551231 is a deficient number, since it is larger than the sum of its proper divisors (1649061793041).

11543432551231 is an equidigital number, since it uses as much as digits as its factorization.

11543432551231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649061793040.

The product of its digits is 216000, while the sum is 40.

Adding to 11543432551231 its reverse (13215523434511), we get a palindrome (24758955985742).

The spelling of 11543432551231 in words is "eleven trillion, five hundred forty-three billion, four hundred thirty-two million, five hundred fifty-one thousand, two hundred thirty-one".