31224331040 has 144 divisors (see below), whose sum is σ = 85212533952. Its totient is φ = 10591543296.

The previous prime is 31224331037. The next prime is 31224331049. The reversal of 31224331040 is 4013342213.

It is a junction number, because it is equal to n+sod(n) for n = 31224330997 and 31224331015.

It is not an unprimeable number, because it can be changed into a prime (31224331049) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 10536599 + ... + 10539561.

It is an arithmetic number, because the mean of its divisors is an integer number (591753708).

Almost surely, 2^31224331040 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 31224331040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42606266976).

31224331040 is an abundant number, since it is smaller than the sum of its proper divisors (53988202912).

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

31224331040 is an equidigital number, since it uses as much as digits as its factorization.

31224331040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3179 (or 3074 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31224331040 its reverse (4013342213), we get a palindrome (35237673253).

The spelling of 31224331040 in words is "thirty-one billion, two hundred twenty-four million, three hundred thirty-one thousand, forty".