31431303340444 has 12 divisors (see below), whose sum is σ = 62862606680944. Its totient is φ = 13470558574464.

The previous prime is 31431303340391. The next prime is 31431303340447. The reversal of 31431303340444 is 44404330313413.

31431303340444 is an admirable number.

It is a super-2 number, since 2×31431303340444² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31431303340447) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 561273273909 + ... + 561273273964.

Almost surely, 2^{31431303340444} is an apocalyptic number.

It is an amenable number.

31431303340444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31431303340444 is a wasteful number, since it uses less digits than its factorization.

31431303340444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122546547884 (or 1122546547882 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 37.

Adding to 31431303340444 its reverse (44404330313413), we get a palindrome (75835633653857).

The spelling of 31431303340444 in words is "thirty-one trillion, four hundred thirty-one billion, three hundred three million, three hundred forty thousand, four hundred forty-four".