231111423 has 6 divisors (see below), whose sum is σ = 333827624. Its totient is φ = 154074276.

The previous prime is 231111409. The next prime is 231111427. The reversal of 231111423 is 324111132.

231111423 is a `hidden beast` number, since 231 + 1 + 11 + 423 = 666.

It is not a de Polignac number, because 231111423 - 2¹³ = 231103231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231111396 and 231111405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231111427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12839515 + ... + 12839532.

Almost surely, 2^231111423 is an apocalyptic number.

231111423 is a deficient number, since it is larger than the sum of its proper divisors (102716201).

231111423 is a wasteful number, since it uses less digits than its factorization.

231111423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25679053 (or 25679050 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 231111423 is about 15202.3492592428. The cubic root of 231111423 is about 613.6778815575.

Adding to 231111423 its reverse (324111132), we get a palindrome (555222555).

The spelling of 231111423 in words is "two hundred thirty-one million, one hundred eleven thousand, four hundred twenty-three".