31320440244 has 72 divisors (see below), whose sum is σ = 79465643712. Its totient is φ = 10401390720.

The previous prime is 31320440243. The next prime is 31320440287. The reversal of 31320440244 is 44204402313.

It is a happy number.

31320440244 is a `hidden beast` number, since 3 + 13 + 204 + 402 + 44 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320440243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14546272 + ... + 14548424.

It is an arithmetic number, because the mean of its divisors is an integer number (1103689496).

Almost surely, 2^31320440244 is an apocalyptic number.

It is an amenable number.

31320440244 is an abundant number, since it is smaller than the sum of its proper divisors (48145203468).

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

31320440244 is a wasteful number, since it uses less digits than its factorization.

31320440244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3477 (or 3472 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 31320440244 its reverse (44204402313), we get a palindrome (75524842557).

The spelling of 31320440244 in words is "thirty-one billion, three hundred twenty million, four hundred forty thousand, two hundred forty-four".