142231406305 has 4 divisors (see below), whose sum is σ = 170677687572. Its totient is φ = 113785125040.

The previous prime is 142231406297. The next prime is 142231406309. The reversal of 142231406305 is 503604132241.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36038845921 + 106192560384 = 189839^2 + 325872^2 .

It is not a de Polignac number, because 142231406305 - 2³ = 142231406297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142231406309) 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, 14223140626 + ... + 14223140635.

It is an arithmetic number, because the mean of its divisors is an integer number (42669421893).

Almost surely, 2^142231406305 is an apocalyptic number.

It is an amenable number.

142231406305 is a deficient number, since it is larger than the sum of its proper divisors (28446281267).

142231406305 is an equidigital number, since it uses as much as digits as its factorization.

142231406305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28446281266.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 142231406305 its reverse (503604132241), we get a palindrome (645835538546).

The spelling of 142231406305 in words is "one hundred forty-two billion, two hundred thirty-one million, four hundred six thousand, three hundred five".