31223443422432 has 384 divisors, whose sum is σ = 89707558993920. Its totient is φ = 9471179612160.

The previous prime is 31223443422407. The next prime is 31223443422463. The reversal of 31223443422432 is 23422434432213.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2328189807 + ... + 2328203217.

It is an arithmetic number, because the mean of its divisors is an integer number (233613434880).

Almost surely, 2^{31223443422432} is an apocalyptic number.

31223443422432 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31223443422432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44853779496960).

31223443422432 is an abundant number, since it is smaller than the sum of its proper divisors (58484115571488).

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

31223443422432 is a wasteful number, since it uses less digits than its factorization.

31223443422432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13854 (or 13846 counting only the distinct ones).

The product of its digits is 663552, while the sum is 39.

Adding to 31223443422432 its reverse (23422434432213), we get a palindrome (54645877854645).

The spelling of 31223443422432 in words is "thirty-one trillion, two hundred twenty-three billion, four hundred forty-three million, four hundred twenty-two thousand, four hundred thirty-two".