31230143140 has 240 divisors, whose sum is σ = 79394232960. Its totient is φ = 10313049600.

The previous prime is 31230143111. The next prime is 31230143177. The reversal of 31230143140 is 4134103213.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 206822065 + ... + 206822215.

It is an arithmetic number, because the mean of its divisors is an integer number (330809304).

Almost surely, 2^31230143140 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 31230143140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39697116480).

31230143140 is an abundant number, since it is smaller than the sum of its proper divisors (48164089820).

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

31230143140 is a wasteful number, since it uses less digits than its factorization.

31230143140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31230143140 its reverse (4134103213), we get a palindrome (35364246353).

The spelling of 31230143140 in words is "thirty-one billion, two hundred thirty million, one hundred forty-three thousand, one hundred forty".