31018219104 has 48 divisors (see below), whose sum is σ = 81445815360. Its totient is φ = 10336487040.

The previous prime is 31018219081. The next prime is 31018219121. The reversal of 31018219104 is 40191281013.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

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, 310567 + ... + 398105.

It is an arithmetic number, because the mean of its divisors is an integer number (1696787820).

Almost surely, 2^31018219104 is an apocalyptic number.

It is an amenable number.

31018219104 is an abundant number, since it is smaller than the sum of its proper divisors (50427596256).

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

31018219104 is a wasteful number, since it uses less digits than its factorization.

31018219104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91243 (or 91235 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The spelling of 31018219104 in words is "thirty-one billion, eighteen million, two hundred nineteen thousand, one hundred four".