31143044424 has 16 divisors (see below), whose sum is σ = 77857611120. Its totient is φ = 10381014800.

The previous prime is 31143044423. The next prime is 31143044441. The reversal of 31143044424 is 42444034113.

It is a junction number, because it is equal to n+sod(n) for n = 31143044391 and 31143044400.

It is not an unprimeable number, because it can be changed into a prime (31143044423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648813402 + ... + 648813449.

It is an arithmetic number, because the mean of its divisors is an integer number (4866100695).

Almost surely, 2^31143044424 is an apocalyptic number.

It is an amenable number.

31143044424 is an abundant number, since it is smaller than the sum of its proper divisors (46714566696).

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

31143044424 is a wasteful number, since it uses less digits than its factorization.

31143044424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297626860 (or 1297626856 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 31143044424 its reverse (42444034113), we get a palindrome (73587078537).

The spelling of 31143044424 in words is "thirty-one billion, one hundred forty-three million, forty-four thousand, four hundred twenty-four".