31215355431044 has 24 divisors (see below), whose sum is σ = 54700032784320. Its totient is φ = 15586780115936.

The previous prime is 31215355431037. The next prime is 31215355431047. The reversal of 31215355431044 is 44013455351213.

It is a junction number, because it is equal to n+sod(n) for n = 31215355430992 and 31215355431010.

It is not an unprimeable number, because it can be changed into a prime (31215355431047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22230194 + ... + 23592630.

It is an arithmetic number, because the mean of its divisors is an integer number (2279168032680).

Almost surely, 2^{31215355431044} is an apocalyptic number.

It is an amenable number.

31215355431044 is a deficient number, since it is larger than the sum of its proper divisors (23484677353276).

31215355431044 is a wasteful number, since it uses less digits than its factorization.

31215355431044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370107 (or 1370105 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 31215355431044 in words is "thirty-one trillion, two hundred fifteen billion, three hundred fifty-five million, four hundred thirty-one thousand, forty-four".