31243313424 has 40 divisors (see below), whose sum is σ = 80816945440. Its totient is φ = 10400882688.

The previous prime is 31243313411. The next prime is 31243313447. The reversal of 31243313424 is 42431334213.

It is a happy number.

It is a super-2 number, since 2×31243313424² (a number of 22 digits) contains 22 as substring.

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 = 31243313391 and 31243313400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386302 + ... + 460125.

It is an arithmetic number, because the mean of its divisors is an integer number (2020423636).

Almost surely, 2^31243313424 is an apocalyptic number.

It is an amenable number.

31243313424 is an abundant number, since it is smaller than the sum of its proper divisors (49573632016).

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

31243313424 is a wasteful number, since it uses less digits than its factorization.

31243313424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847207 (or 847201 counting only the distinct ones).

The product of its digits is 20736, while the sum is 30.

Adding to 31243313424 its reverse (42431334213), we get a palindrome (73674647637).

The spelling of 31243313424 in words is "thirty-one billion, two hundred forty-three million, three hundred thirteen thousand, four hundred twenty-four".