31043143020 has 48 divisors (see below), whose sum is σ = 87406421760. Its totient is φ = 8231921856.

The previous prime is 31043142959. The next prime is 31043143039. The reversal of 31043143020 is 2034134013.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1434472 + ... + 1455951.

It is an arithmetic number, because the mean of its divisors is an integer number (1820967120).

Almost surely, 2^31043143020 is an apocalyptic number.

31043143020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31043143020 is an abundant number, since it is smaller than the sum of its proper divisors (56363278740).

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

31043143020 is a wasteful number, since it uses less digits than its factorization.

31043143020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2890614 (or 2890612 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31043143020 its reverse (2034134013), we get a palindrome (33077277033).

The spelling of 31043143020 in words is "thirty-one billion, forty-three million, one hundred forty-three thousand, twenty".