31143422424 has 64 divisors (see below), whose sum is σ = 82275580800. Its totient is φ = 9796460544.

The previous prime is 31143422411. The next prime is 31143422503. The reversal of 31143422424 is 42422434113.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 31143422391 and 31143422400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15682 + ... + 250065.

It is an arithmetic number, because the mean of its divisors is an integer number (1285555950).

Almost surely, 2^31143422424 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 31143422424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41137790400).

31143422424 is an abundant number, since it is smaller than the sum of its proper divisors (51132158376).

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

31143422424 is a wasteful number, since it uses less digits than its factorization.

31143422424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266032 (or 266028 counting only the distinct ones).

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

Adding to 31143422424 its reverse (42422434113), we get a palindrome (73565856537).

The spelling of 31143422424 in words is "thirty-one billion, one hundred forty-three million, four hundred twenty-two thousand, four hundred twenty-four".