142323231 has 4 divisors (see below), whose sum is σ = 189764312. Its totient is φ = 94882152.

The previous prime is 142323229. The next prime is 142323253. The reversal of 142323231 is 132323241.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 142323231 - 2¹ = 142323229 is a prime.

It is a super-2 number, since 2×142323231² = 40511804164558722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142323198 and 142323207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142323131) 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 3 ways as a sum of consecutive naturals, for example, 23720536 + ... + 23720541.

It is an arithmetic number, because the mean of its divisors is an integer number (47441078).

Almost surely, 2^142323231 is an apocalyptic number.

142323231 is a deficient number, since it is larger than the sum of its proper divisors (47441081).

142323231 is an equidigital number, since it uses as much as digits as its factorization.

142323231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47441080.

The product of its digits is 864, while the sum is 21.

The square root of 142323231 is about 11929.9300500883. The cubic root of 142323231 is about 522.1058966612.

Adding to 142323231 its reverse (132323241), we get a palindrome (274646472).

The spelling of 142323231 in words is "one hundred forty-two million, three hundred twenty-three thousand, two hundred thirty-one".