142444331 has 2 divisors, whose sum is σ = 142444332. Its totient is φ = 142444330.

The previous prime is 142444319. The next prime is 142444363. The reversal of 142444331 is 133444241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142444331 - 2²² = 138250027 is a prime.

It is a super-2 number, since 2×142444331² = 40580774868075122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142444331.

It is not a weakly prime, because it can be changed into another prime (142444391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71222165 + 71222166.

It is an arithmetic number, because the mean of its divisors is an integer number (71222166).

Almost surely, 2^142444331 is an apocalyptic number.

142444331 is a deficient number, since it is larger than the sum of its proper divisors (1).

142444331 is an equidigital number, since it uses as much as digits as its factorization.

142444331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 26.

The square root of 142444331 is about 11935.0044407197. The cubic root of 142444331 is about 522.2539378471.

Adding to 142444331 its reverse (133444241), we get a palindrome (275888572).

The spelling of 142444331 in words is "one hundred forty-two million, four hundred forty-four thousand, three hundred thirty-one".