31310443140 has 96 divisors (see below), whose sum is σ = 93547816320. Its totient is φ = 7801629696.

The previous prime is 31310443139. The next prime is 31310443181. The reversal of 31310443140 is 4134401313.

It is a self number, because there is not a number n which added to its sum of digits gives 31310443140.

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, 104899 + ... + 271338.

It is an arithmetic number, because the mean of its divisors is an integer number (974456420).

Almost surely, 2^31310443140 is an apocalyptic number.

31310443140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31310443140 is an abundant number, since it is smaller than the sum of its proper divisors (62237373180).

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

31310443140 is a wasteful number, since it uses less digits than its factorization.

31310443140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376341 (or 376339 counting only the distinct ones).

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

Adding to 31310443140 its reverse (4134401313), we get a palindrome (35444844453).

The spelling of 31310443140 in words is "thirty-one billion, three hundred ten million, four hundred forty-three thousand, one hundred forty".