31432214440 has 192 divisors, whose sum is σ = 80088471360. Its totient is φ = 11008558080.

The previous prime is 31432214419. The next prime is 31432214441. The reversal of 31432214440 is 4441223413.

It is a junction number, because it is equal to n+sod(n) for n = 31432214399 and 31432214408.

It is not an unprimeable number, because it can be changed into a prime (31432214441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70952859 + ... + 70953301.

It is an arithmetic number, because the mean of its divisors is an integer number (417127455).

Almost surely, 2^31432214440 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 31432214440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40044235680).

31432214440 is an abundant number, since it is smaller than the sum of its proper divisors (48656256920).

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

31432214440 is a wasteful number, since it uses less digits than its factorization.

31432214440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 31432214440 its reverse (4441223413), we get a palindrome (35873437853).

The spelling of 31432214440 in words is "thirty-one billion, four hundred thirty-two million, two hundred fourteen thousand, four hundred forty".