142321810231 has 4 divisors (see below), whose sum is σ = 142551733000. Its totient is φ = 142091887464.

The previous prime is 142321810219. The next prime is 142321810243. The reversal of 142321810231 is 132018123241.

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

It is an interprime number because it is at equal distance from previous prime (142321810219) and next prime (142321810243).

It is a cyclic number.

It is not a de Polignac number, because 142321810231 - 2²¹ = 142319713079 is a prime.

It is a super-2 number, since 2×142321810231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142321810231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142321810931) 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, 114960456 + ... + 114961693.

It is an arithmetic number, because the mean of its divisors is an integer number (35637933250).

Almost surely, 2^142321810231 is an apocalyptic number.

142321810231 is a deficient number, since it is larger than the sum of its proper divisors (229922769).

142321810231 is an equidigital number, since it uses as much as digits as its factorization.

142321810231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229922768.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 142321810231 its reverse (132018123241), we get a palindrome (274339933472).

The spelling of 142321810231 in words is "one hundred forty-two billion, three hundred twenty-one million, eight hundred ten thousand, two hundred thirty-one".