40443231311 has 4 divisors (see below), whose sum is σ = 46220835792. Its totient is φ = 34665626832.

The previous prime is 40443231263. The next prime is 40443231317. The reversal of 40443231311 is 11313234404.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40443231311 - 2¹⁸ = 40442969167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40443231317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2888802230 + ... + 2888802243.

It is an arithmetic number, because the mean of its divisors is an integer number (11555208948).

Almost surely, 2^40443231311 is an apocalyptic number.

40443231311 is a deficient number, since it is larger than the sum of its proper divisors (5777604481).

40443231311 is an equidigital number, since it uses as much as digits as its factorization.

40443231311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5777604480.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 40443231311 its reverse (11313234404), we get a palindrome (51756465715).

The spelling of 40443231311 in words is "forty billion, four hundred forty-three million, two hundred thirty-one thousand, three hundred eleven".