31143141 has 12 divisors (see below), whose sum is σ = 45656832. Its totient is φ = 20451816.

The previous prime is 31143113. The next prime is 31143157. The reversal of 31143141 is 14134113.

It is not a de Polignac number, because 31143141 - 2¹⁰ = 31142117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25221 + ... + 26426.

It is an arithmetic number, because the mean of its divisors is an integer number (3804736).

Almost surely, 2^31143141 is an apocalyptic number.

It is an amenable number.

31143141 is a deficient number, since it is larger than the sum of its proper divisors (14513691).

31143141 is a wasteful number, since it uses less digits than its factorization.

31143141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51720 (or 51717 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 31143141 is about 5580.6039995685. The cubic root of 31143141 is about 314.6208287261.

Adding to 31143141 its reverse (14134113), we get a palindrome (45277254).

Subtracting from 31143141 its reverse (14134113), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 31143141 in words is "thirty-one million, one hundred forty-three thousand, one hundred forty-one".