331144424 has 32 divisors (see below), whose sum is σ = 681284520. Its totient is φ = 149949696.

The previous prime is 331144421. The next prime is 331144427. The reversal of 331144424 is 424441133.

It is an interprime number because it is at equal distance from previous prime (331144421) and next prime (331144427).

It can be written as a sum of positive squares in 4 ways, for example, as 247055524 + 84088900 = 15718^2 + 9170^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 331144393 and 331144402.

It is not an unprimeable number, because it can be changed into a prime (331144421) 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 7 ways as a sum of consecutive naturals, for example, 24527 + ... + 35550.

Almost surely, 2^331144424 is an apocalyptic number.

It is an amenable number.

331144424 is an abundant number, since it is smaller than the sum of its proper divisors (350140096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331144424 is a wasteful number, since it uses less digits than its factorization.

331144424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60149 (or 60145 counting only the distinct ones).

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

The square root of 331144424 is about 18197.3740962810. The cubic root of 331144424 is about 691.8402350943.

Adding to 331144424 its reverse (424441133), we get a palindrome (755585557).

The spelling of 331144424 in words is "three hundred thirty-one million, one hundred forty-four thousand, four hundred twenty-four".