111543441231 has 8 divisors (see below), whose sum is σ = 152183299840. Its totient is φ = 72632938392.

The previous prime is 111543441223. The next prime is 111543441241. The reversal of 111543441231 is 132144345111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111543441231 - 2³ = 111543441223 is a prime.

It is a super-2 number, since 2×111543441231² (a number of 23 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 (111543441241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432338791 + ... + 432339048.

It is an arithmetic number, because the mean of its divisors is an integer number (19022912480).

Almost surely, 2^111543441231 is an apocalyptic number.

111543441231 is a deficient number, since it is larger than the sum of its proper divisors (40639858609).

111543441231 is an equidigital number, since it uses as much as digits as its factorization.

111543441231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864677885.

The product of its digits is 5760, while the sum is 30.

Adding to 111543441231 its reverse (132144345111), we get a palindrome (243687786342).

The spelling of 111543441231 in words is "one hundred eleven billion, five hundred forty-three million, four hundred forty-one thousand, two hundred thirty-one".