231142142 has 32 divisors (see below), whose sum is σ = 433762560. Its totient is φ = 89743680.

The previous prime is 231142123. The next prime is 231142147. The reversal of 231142142 is 241241132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231142147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44834 + ... + 49722.

It is an arithmetic number, because the mean of its divisors is an integer number (13555080).

Almost surely, 2^231142142 is an apocalyptic number.

231142142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231142142 is a deficient number, since it is larger than the sum of its proper divisors (202620418).

231142142 is a wasteful number, since it uses less digits than its factorization.

231142142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5216.

The product of its digits is 384, while the sum is 20.

The square root of 231142142 is about 15203.3595629387. The cubic root of 231142142 is about 613.7050700819.

Adding to 231142142 its reverse (241241132), we get a palindrome (472383274).

The spelling of 231142142 in words is "two hundred thirty-one million, one hundred forty-two thousand, one hundred forty-two".