111231523556 has 6 divisors (see below), whose sum is σ = 194655166230. Its totient is φ = 55615761776.

The previous prime is 111231523519. The next prime is 111231523589. The reversal of 111231523556 is 655325132111.

It can be written as a sum of positive squares in only one way, i.e., 105874747456 + 5356776100 = 325384^2 + 73190^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13903940441 + ... + 13903940448.

It is an arithmetic number, because the mean of its divisors is an integer number (32442527705).

Almost surely, 2^111231523556 is an apocalyptic number.

It is an amenable number.

111231523556 is a deficient number, since it is larger than the sum of its proper divisors (83423642674).

111231523556 is a wasteful number, since it uses less digits than its factorization.

111231523556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27807880893 (or 27807880891 counting only the distinct ones).

The product of its digits is 27000, while the sum is 35.

Adding to 111231523556 its reverse (655325132111), we get a palindrome (766556655667).

The spelling of 111231523556 in words is "one hundred eleven billion, two hundred thirty-one million, five hundred twenty-three thousand, five hundred fifty-six".