40311111220 has 12 divisors (see below), whose sum is σ = 84653333604. Its totient is φ = 16124444480.

The previous prime is 40311111149. The next prime is 40311111223. The reversal of 40311111220 is 2211111304.

It can be written as a sum of positive squares in 2 ways, for example, as 28131340176 + 12179771044 = 167724^2 + 110362^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40311111194 and 40311111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40311111223) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1007777761 + ... + 1007777800.

It is an arithmetic number, because the mean of its divisors is an integer number (7054444467).

Almost surely, 2^40311111220 is an apocalyptic number.

It is an amenable number.

40311111220 is an abundant number, since it is smaller than the sum of its proper divisors (44342222384).

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

40311111220 is a wasteful number, since it uses less digits than its factorization.

40311111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015555570 (or 2015555568 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 40311111220 its reverse (2211111304), we get a palindrome (42522222524).

The spelling of 40311111220 in words is "forty billion, three hundred eleven million, one hundred eleven thousand, two hundred twenty".