111111331523 has 8 divisors (see below), whose sum is σ = 117162010320. Its totient is φ = 105080924160.

The previous prime is 111111331489. The next prime is 111111331601. The reversal of 111111331523 is 325133111111.

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

It is a cyclic number.

It is not a de Polignac number, because 111111331523 - 2¹² = 111111327427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111111337523) 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, 5056598 + ... + 5078523.

It is an arithmetic number, because the mean of its divisors is an integer number (14645251290).

Almost surely, 2^111111331523 is an apocalyptic number.

111111331523 is a deficient number, since it is larger than the sum of its proper divisors (6050678797).

111111331523 is a wasteful number, since it uses less digits than its factorization.

111111331523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10135717.

The product of its digits is 270, while the sum is 23.

Adding to 111111331523 its reverse (325133111111), we get a palindrome (436244442634).

The spelling of 111111331523 in words is "one hundred eleven billion, one hundred eleven million, three hundred thirty-one thousand, five hundred twenty-three".