142231322 has 4 divisors (see below), whose sum is σ = 213346986. Its totient is φ = 71115660.

The previous prime is 142231307. The next prime is 142231339. The reversal of 142231322 is 223132241.

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

It can be written as a sum of positive squares in only one way, i.e., 108347281 + 33884041 = 10409^2 + 5821^2 .

It is a junction number, because it is equal to n+sod(n) for n = 142231294 and 142231303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35557829 + ... + 35557832.

Almost surely, 2^142231322 is an apocalyptic number.

142231322 is a deficient number, since it is larger than the sum of its proper divisors (71115664).

142231322 is an equidigital number, since it uses as much as digits as its factorization.

142231322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71115663.

The product of its digits is 576, while the sum is 20.

The square root of 142231322 is about 11926.0773936781. The cubic root of 142231322 is about 521.9934845514.

Adding to 142231322 its reverse (223132241), we get a palindrome (365363563).

The spelling of 142231322 in words is "one hundred forty-two million, two hundred thirty-one thousand, three hundred twenty-two".