31233222013240 has 256 divisors, whose sum is σ = 80392819852800. Its totient is φ = 10818650013696.

The previous prime is 31233222013237. The next prime is 31233222013267. The reversal of 31233222013240 is 4231022233213.

It is a junction number, because it is equal to n+sod(n) for n = 31233222013199 and 31233222013208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8380256257 + ... + 8380259983.

It is an arithmetic number, because the mean of its divisors is an integer number (314034452550).

Almost surely, 2^{31233222013240} 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 31233222013240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40196409926400).

31233222013240 is an abundant number, since it is smaller than the sum of its proper divisors (49159597839560).

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

31233222013240 is a wasteful number, since it uses less digits than its factorization.

31233222013240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6594 (or 6590 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 31233222013240 its reverse (4231022233213), we get a palindrome (35464244246453).

The spelling of 31233222013240 in words is "thirty-one trillion, two hundred thirty-three billion, two hundred twenty-two million, thirteen thousand, two hundred forty".