31222345000 has 160 divisors (see below), whose sum is σ = 91206054720. Its totient is φ = 9731520000.

The previous prime is 31222344991. The next prime is 31222345043. The reversal of 31222345000 is 54322213.

It is a Harshad number since it is a multiple of its sum of digits (22).

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 39 ways as a sum of consecutive naturals, for example, 344452 + ... + 425548.

It is an arithmetic number, because the mean of its divisors is an integer number (570037842).

Almost surely, 2^31222345000 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 31222345000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45603027360).

31222345000 is an abundant number, since it is smaller than the sum of its proper divisors (59983709720).

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

31222345000 is a wasteful number, since it uses less digits than its factorization.

31222345000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81141 (or 81122 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 31222345000 its reverse (54322213), we get a palindrome (31276667213).

The spelling of 31222345000 in words is "thirty-one billion, two hundred twenty-two million, three hundred forty-five thousand".