31310320111224 has 128 divisors (see below), whose sum is σ = 97610671226880. Its totient is φ = 8130878755200.

The previous prime is 31310320111211. The next prime is 31310320111241. The reversal of 31310320111224 is 42211102301313.

It is a super-2 number, since 2×31310320111224² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 31310320111194 and 31310320111203.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 7262457 + ... + 10740759.

It is an arithmetic number, because the mean of its divisors is an integer number (762583368960).

Almost surely, 2^{31310320111224} 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 31310320111224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48805335613440).

31310320111224 is an abundant number, since it is smaller than the sum of its proper divisors (66300351115656).

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

31310320111224 is a wasteful number, since it uses less digits than its factorization.

31310320111224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3483201 (or 3483197 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 31310320111224 its reverse (42211102301313), we get a palindrome (73521422412537).

The spelling of 31310320111224 in words is "thirty-one trillion, three hundred ten billion, three hundred twenty million, one hundred eleven thousand, two hundred twenty-four".