142330031 has 4 divisors (see below), whose sum is σ = 142740552. Its totient is φ = 141919512.

The previous prime is 142329989. The next prime is 142330061. The reversal of 142330031 is 130033241.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142330031 is a prime.

It is a super-2 number, since 2×142330031² = 40515675448921922, 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 = 142329991 and 142330009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142330061) 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, 204740 + ... + 205433.

It is an arithmetic number, because the mean of its divisors is an integer number (35685138).

Almost surely, 2^142330031 is an apocalyptic number.

142330031 is a deficient number, since it is larger than the sum of its proper divisors (410521).

142330031 is an equidigital number, since it uses as much as digits as its factorization.

142330031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410520.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 142330031 is about 11930.2150441641. The cubic root of 142330031 is about 522.1142116860.

Adding to 142330031 its reverse (130033241), we get a palindrome (272363272).

The spelling of 142330031 in words is "one hundred forty-two million, three hundred thirty thousand, thirty-one".