31232413140 has 96 divisors (see below), whose sum is σ = 89271020160. Its totient is φ = 8156729856.

The previous prime is 31232413109. The next prime is 31232413159. The reversal of 31232413140 is 4131423213.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31232413140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 673006 + ... + 717914.

It is an arithmetic number, because the mean of its divisors is an integer number (929906460).

Almost surely, 2^31232413140 is an apocalyptic number.

31232413140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31232413140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44635510080).

31232413140 is an abundant number, since it is smaller than the sum of its proper divisors (58038607020).

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

31232413140 is a wasteful number, since it uses less digits than its factorization.

31232413140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45161 (or 45159 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31232413140 its reverse (4131423213), we get a palindrome (35363836353).

The spelling of 31232413140 in words is "thirty-one billion, two hundred thirty-two million, four hundred thirteen thousand, one hundred forty".