31112424 has 160 divisors (see below), whose sum is σ = 105124800. Its totient is φ = 8421408.

The previous prime is 31112401. The next prime is 31112441. The reversal of 31112424 is 42421113.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 = 31112397 and 31112406.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1637487 + ... + 1637505.

It is an arithmetic number, because the mean of its divisors is an integer number (657030).

Almost surely, 2^31112424 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 31112424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52562400).

31112424 is an abundant number, since it is smaller than the sum of its proper divisors (74012376).

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

31112424 is an equidigital number, since it uses as much as digits as its factorization.

31112424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 31 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 31112424 is about 5577.8511991626. The cubic root of 31112424 is about 314.5173561074.

Adding to 31112424 its reverse (42421113), we get a palindrome (73533537).

The spelling of 31112424 in words is "thirty-one million, one hundred twelve thousand, four hundred twenty-four".