231111342 has 192 divisors, whose sum is σ = 660441600. Its totient is φ = 57859200.

The previous prime is 231111281. The next prime is 231111347. The reversal of 231111342 is 243111132.

231111342 is a `hidden beast` number, since 2 + 311 + 11 + 342 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231111347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2784433 + ... + 2784515.

It is an arithmetic number, because the mean of its divisors is an integer number (3439800).

Almost surely, 2^231111342 is an apocalyptic number.

231111342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 231111342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330220800).

231111342 is an abundant number, since it is smaller than the sum of its proper divisors (429330258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231111342 is a wasteful number, since it uses less digits than its factorization.

231111342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 147 counting only the distinct ones).

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

The square root of 231111342 is about 15202.3465951806. The cubic root of 231111342 is about 613.6778098635.

Adding to 231111342 its reverse (243111132), we get a palindrome (474222474).

The spelling of 231111342 in words is "two hundred thirty-one million, one hundred eleven thousand, three hundred forty-two".