31040230312 has 192 divisors, whose sum is σ = 75612096000. Its totient is φ = 11828436480.

The previous prime is 31040230241. The next prime is 31040230321. The reversal of 31040230312 is 21303204013.

It is a self number, because there is not a number n which added to its sum of digits gives 31040230312.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55133343 + ... + 55133905.

It is an arithmetic number, because the mean of its divisors is an integer number (393813000).

Almost surely, 2^31040230312 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 31040230312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37806048000).

31040230312 is an abundant number, since it is smaller than the sum of its proper divisors (44571865688).

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

31040230312 is a wasteful number, since it uses less digits than its factorization.

31040230312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976 (or 965 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31040230312 its reverse (21303204013), we get a palindrome (52343434325).

The spelling of 31040230312 in words is "thirty-one billion, forty million, two hundred thirty thousand, three hundred twelve".