231032142 has 128 divisors (see below), whose sum is σ = 600929280. Its totient is φ = 65018880.

The previous prime is 231032101. The next prime is 231032161. The reversal of 231032142 is 241230132.

231032142 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1383343 + ... + 1383509.

It is an arithmetic number, because the mean of its divisors is an integer number (4694760).

Almost surely, 2^231032142 is an apocalyptic number.

231032142 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 231032142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300464640).

231032142 is an abundant number, since it is smaller than the sum of its proper divisors (369897138).

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

231032142 is a wasteful number, since it uses less digits than its factorization.

231032142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 231032142 is about 15199.7415109600. The cubic root of 231032142 is about 613.6077010361.

Adding to 231032142 its reverse (241230132), we get a palindrome (472262274).

The spelling of 231032142 in words is "two hundred thirty-one million, thirty-two thousand, one hundred forty-two".