144231442 has 16 divisors (see below), whose sum is σ = 226330200. Its totient is φ = 68844160.

The previous prime is 144231433. The next prime is 144231443. The reversal of 144231442 is 244132441.

It can be written as a sum of positive squares in 4 ways, for example, as 104427961 + 39803481 = 10219^2 + 6309^2 .

It is a super-2 number, since 2×144231442² = 41605417722798728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (144231443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8809 + ... + 19132.

Almost surely, 2^144231442 is an apocalyptic number.

144231442 is a deficient number, since it is larger than the sum of its proper divisors (82098758).

144231442 is a wasteful number, since it uses less digits than its factorization.

144231442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28061.

The product of its digits is 3072, while the sum is 25.

The square root of 144231442 is about 12009.6395449655. The cubic root of 144231442 is about 524.4289385471.

Adding to 144231442 its reverse (244132441), we get a palindrome (388363883).

Subtracting 144231442 from its reverse (244132441), we obtain a palindrome (99900999).

The spelling of 144231442 in words is "one hundred forty-four million, two hundred thirty-one thousand, four hundred forty-two".