31310144 has 28 divisors (see below), whose sum is σ = 62387988. Its totient is φ = 15590400.

The previous prime is 31310137. The next prime is 31310161. The reversal of 31310144 is 44101313.

It can be written as a sum of positive squares in 2 ways, for example, as 7182400 + 24127744 = 2680^2 + 4912^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17114 + ... + 18854.

Almost surely, 2^31310144 is an apocalyptic number.

It is an amenable number.

31310144 is a deficient number, since it is larger than the sum of its proper divisors (31077844).

31310144 is a wasteful number, since it uses less digits than its factorization.

31310144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034 (or 2024 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 31310144 is about 5595.5468008051. The cubic root of 31310144 is about 315.1822041539.

Adding to 31310144 its reverse (44101313), we get a palindrome (75411457).

The spelling of 31310144 in words is "thirty-one million, three hundred ten thousand, one hundred forty-four".