142243231 has 16 divisors (see below), whose sum is σ = 159112800. Its totient is φ = 126258048.

The previous prime is 142243223. The next prime is 142243243. The reversal of 142243231 is 132342241.

It is not a de Polignac number, because 142243231 - 2³ = 142243223 is a prime.

It is a super-2 number, since 2×142243231² = 40466273530638722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142243831) 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 15 ways as a sum of consecutive naturals, for example, 115125 + ... + 116353.

It is an arithmetic number, because the mean of its divisors is an integer number (9944550).

Almost surely, 2^142243231 is an apocalyptic number.

142243231 is a deficient number, since it is larger than the sum of its proper divisors (16869569).

142243231 is a wasteful number, since it uses less digits than its factorization.

142243231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578.

The product of its digits is 1152, while the sum is 22.

The square root of 142243231 is about 11926.5766672587. The cubic root of 142243231 is about 522.0080529480.

Adding to 142243231 its reverse (132342241), we get a palindrome (274585472).

The spelling of 142243231 in words is "one hundred forty-two million, two hundred forty-three thousand, two hundred thirty-one".