331144442 has 4 divisors (see below), whose sum is σ = 496716666. Its totient is φ = 165572220.

The previous prime is 331144441. The next prime is 331144447. The reversal of 331144442 is 244441133.

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., 243328801 + 87815641 = 15599^2 + 9371^2 .

It is not an unprimeable number, because it can be changed into a prime (331144441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82786109 + ... + 82786112.

Almost surely, 2^331144442 is an apocalyptic number.

331144442 is a deficient number, since it is larger than the sum of its proper divisors (165572224).

331144442 is a wasteful number, since it uses less digits than its factorization.

331144442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165572223.

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

The square root of 331144442 is about 18197.3745908579. The cubic root of 331144442 is about 691.8402476297.

Adding to 331144442 its reverse (244441133), we get a palindrome (575585575).

The spelling of 331144442 in words is "three hundred thirty-one million, one hundred forty-four thousand, four hundred forty-two".