31043144 has 32 divisors (see below), whose sum is σ = 64549440. Its totient is φ = 13876800.

The previous prime is 31043141. The next prime is 31043147. The reversal of 31043144 is 44134013.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31043141) and next prime (31043147).

It is not an unprimeable number, because it can be changed into a prime (31043141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2477 + ... + 8259.

It is an arithmetic number, because the mean of its divisors is an integer number (2017170).

Almost surely, 2^31043144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31043144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32274720).

31043144 is an abundant number, since it is smaller than the sum of its proper divisors (33506296).

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

31043144 is a wasteful number, since it uses less digits than its factorization.

31043144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5861 (or 5857 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 31043144 is about 5571.6374612855. The cubic root of 31043144 is about 314.2837307234.

Adding to 31043144 its reverse (44134013), we get a palindrome (75177157).

The spelling of 31043144 in words is "thirty-one million, forty-three thousand, one hundred forty-four".