40243031312 has 80 divisors (see below), whose sum is σ = 90516528000. Its totient is φ = 17129502720.

The previous prime is 40243031303. The next prime is 40243031327. The reversal of 40243031312 is 21313034204.

It is a super-2 number, since 2×40243031312² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 561614 + ... + 629202.

It is an arithmetic number, because the mean of its divisors is an integer number (1131456600).

Almost surely, 2^40243031312 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 40243031312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45258264000).

40243031312 is an abundant number, since it is smaller than the sum of its proper divisors (50273496688).

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

40243031312 is a wasteful number, since it uses less digits than its factorization.

40243031312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67824 (or 67818 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 40243031312 its reverse (21313034204), we get a palindrome (61556065516).

The spelling of 40243031312 in words is "forty billion, two hundred forty-three million, thirty-one thousand, three hundred twelve".