31440224140 has 96 divisors (see below), whose sum is σ = 74136545280. Its totient is φ = 11119804416.

The previous prime is 31440224131. The next prime is 31440224161. The reversal of 31440224140 is 4142204413.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 941164 + ... + 973996.

It is an arithmetic number, because the mean of its divisors is an integer number (772255680).

Almost surely, 2^31440224140 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 31440224140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37068272640).

31440224140 is an abundant number, since it is smaller than the sum of its proper divisors (42696321140).

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

31440224140 is a wasteful number, since it uses less digits than its factorization.

31440224140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33011 (or 33009 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 31440224140 its reverse (4142204413), we get a palindrome (35582428553).

The spelling of 31440224140 in words is "thirty-one billion, four hundred forty million, two hundred twenty-four thousand, one hundred forty".