31440211120 has 20 divisors (see below), whose sum is σ = 73098491040. Its totient is φ = 12576084416.

The previous prime is 31440211093. The next prime is 31440211133. The reversal of 31440211120 is 2111204413.

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 196501240 + ... + 196501399.

It is an arithmetic number, because the mean of its divisors is an integer number (3654924552).

Almost surely, 2^31440211120 is an apocalyptic number.

It is an amenable number.

31440211120 is an abundant number, since it is smaller than the sum of its proper divisors (41658279920).

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

31440211120 is a wasteful number, since it uses less digits than its factorization.

31440211120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393002652 (or 393002646 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 31440211120 its reverse (2111204413), we get a palindrome (33551415533).

The spelling of 31440211120 in words is "thirty-one billion, four hundred forty million, two hundred eleven thousand, one hundred twenty".