231113142 has 64 divisors (see below), whose sum is σ = 555145920. Its totient is φ = 70848000.

The previous prime is 231113117. The next prime is 231113143. The reversal of 231113142 is 241311132.

231113142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231113142² = 106826568810224328, which contains 22 as substring.

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 (231113143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 281092 + ... + 281912.

It is an arithmetic number, because the mean of its divisors is an integer number (8674155).

Almost surely, 2^231113142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231113142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277572960).

231113142 is an abundant number, since it is smaller than the sum of its proper divisors (324032778).

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

231113142 is a wasteful number, since it uses less digits than its factorization.

231113142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246 (or 1240 counting only the distinct ones).

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

The square root of 231113142 is about 15202.4057964521. The cubic root of 231113142 is about 613.6794030598.

Adding to 231113142 its reverse (241311132), we get a palindrome (472424274).

The spelling of 231113142 in words is "two hundred thirty-one million, one hundred thirteen thousand, one hundred forty-two".