111203431623 has 24 divisors (see below), whose sum is σ = 162760870272. Its totient is φ = 73153021968.

The previous prime is 111203431597. The next prime is 111203431657. The reversal of 111203431623 is 326134302111.

It is a happy number.

111203431623 is a `hidden beast` number, since 1 + 1 + 1 + 2 + 0 + 3 + 4 + 31 + 623 = 666.

It is not a de Polignac number, because 111203431623 - 2¹² = 111203427527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111203431123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 524340 + ... + 705222.

It is an arithmetic number, because the mean of its divisors is an integer number (6781702928).

Almost surely, 2^111203431623 is an apocalyptic number.

111203431623 is a deficient number, since it is larger than the sum of its proper divisors (51557438649).

111203431623 is a wasteful number, since it uses less digits than its factorization.

111203431623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181795 (or 181792 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 111203431623 its reverse (326134302111), we get a palindrome (437337733734).

The spelling of 111203431623 in words is "one hundred eleven billion, two hundred three million, four hundred thirty-one thousand, six hundred twenty-three".