31440211000 has 128 divisors (see below), whose sum is σ = 80600832000. Its totient is φ = 11384016000.

The previous prime is 31440210979. The next prime is 31440211007. The reversal of 31440211000 is 11204413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440211007) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2623021 + ... + 2634979.

It is an arithmetic number, because the mean of its divisors is an integer number (629694000).

Almost surely, 2^31440211000 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 31440211000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40300416000).

31440211000 is an abundant number, since it is smaller than the sum of its proper divisors (49160621000).

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

31440211000 is a wasteful number, since it uses less digits than its factorization.

31440211000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12230 (or 12216 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31440211000 its reverse (11204413), we get a palindrome (31451415413).

The spelling of 31440211000 in words is "thirty-one billion, four hundred forty million, two hundred eleven thousand".