31332221000 has 64 divisors (see below), whose sum is σ = 74877454080. Its totient is φ = 12266212800.

The previous prime is 31332220999. The next prime is 31332221009. The reversal of 31332221000 is 12223313.

It is a self number, because there is not a number n which added to its sum of digits gives 31332221000.

It is not an unprimeable number, because it can be changed into a prime (31332221009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286322 + ... + 380321.

It is an arithmetic number, because the mean of its divisors is an integer number (1169960220).

Almost surely, 2^31332221000 is an apocalyptic number.

It is an amenable number.

31332221000 is an abundant number, since it is smaller than the sum of its proper divisors (43545233080).

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

31332221000 is a wasteful number, since it uses less digits than its factorization.

31332221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666711 (or 666697 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31332221000 its reverse (12223313), we get a palindrome (31344444313).

The spelling of 31332221000 in words is "thirty-one billion, three hundred thirty-two million, two hundred twenty-one thousand".