142144231 has 4 divisors (see below), whose sum is σ = 142474464. Its totient is φ = 141814000.

The previous prime is 142144199. The next prime is 142144237. The reversal of 142144231 is 132441241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132441241 = 37 ⋅3579493.

It is a cyclic number.

It is not a de Polignac number, because 142144231 - 2⁵ = 142144199 is a prime.

It is a super-2 number, since 2×142144231² = 40409964813162722, 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 (142144237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164470 + ... + 165331.

It is an arithmetic number, because the mean of its divisors is an integer number (35618616).

Almost surely, 2^142144231 is an apocalyptic number.

142144231 is a deficient number, since it is larger than the sum of its proper divisors (330233).

142144231 is an equidigital number, since it uses as much as digits as its factorization.

142144231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330232.

The product of its digits is 768, while the sum is 22.

The square root of 142144231 is about 11922.4255501974. The cubic root of 142144231 is about 521.8869205495.

Adding to 142144231 its reverse (132441241), we get a palindrome (274585472).

The spelling of 142144231 in words is "one hundred forty-two million, one hundred forty-four thousand, two hundred thirty-one".