31143124 has 12 divisors (see below), whose sum is σ = 54539604. Its totient is φ = 15560384.

The previous prime is 31143113. The next prime is 31143157. The reversal of 31143124 is 42134113.

It can be written as a sum of positive squares in 2 ways, for example, as 5438224 + 25704900 = 2332^2 + 5070^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9054 + ... + 12010.

It is an arithmetic number, because the mean of its divisors is an integer number (4544967).

Almost surely, 2^31143124 is an apocalyptic number.

It is an amenable number.

31143124 is a deficient number, since it is larger than the sum of its proper divisors (23396480).

31143124 is a wasteful number, since it uses less digits than its factorization.

31143124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5594 (or 5592 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 31143124 is about 5580.6024764357. The cubic root of 31143124 is about 314.6207714791.

Adding to 31143124 its reverse (42134113), we get a palindrome (73277237).

The spelling of 31143124 in words is "thirty-one million, one hundred forty-three thousand, one hundred twenty-four".