31442211204440 has 32 divisors (see below), whose sum is σ = 71539862580000. Its totient is φ = 12435571171584.

The previous prime is 31442211204431. The next prime is 31442211204539. The reversal of 31442211204440 is 4440211224413.

It is a super-2 number, since 2×31442211204440² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31442211204397 and 31442211204406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4416037340 + ... + 4416044459.

It is an arithmetic number, because the mean of its divisors is an integer number (2235620705625).

Almost surely, 2^{31442211204440} is an apocalyptic number.

It is an amenable number.

31442211204440 is an abundant number, since it is smaller than the sum of its proper divisors (40097651375560).

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

31442211204440 is a wasteful number, since it uses less digits than its factorization.

31442211204440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8832081899 (or 8832081895 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 31442211204440 its reverse (4440211224413), we get a palindrome (35882422428853).

The spelling of 31442211204440 in words is "thirty-one trillion, four hundred forty-two billion, two hundred eleven million, two hundred four thousand, four hundred forty".