31884817109 has 8 divisors (see below), whose sum is σ = 34167147840. Its totient is φ = 29647681216.

The previous prime is 31884817049. The next prime is 31884817127. The reversal of 31884817109 is 90171848813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-31884817109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31884817009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11297249 + ... + 11300070.

It is an arithmetic number, because the mean of its divisors is an integer number (4270893480).

Almost surely, 2^31884817109 is an apocalyptic number.

It is an amenable number.

31884817109 is a deficient number, since it is larger than the sum of its proper divisors (2282330731).

31884817109 is a wasteful number, since it uses less digits than its factorization.

31884817109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22597419.

The product of its (nonzero) digits is 387072, while the sum is 50.

The spelling of 31884817109 in words is "thirty-one billion, eight hundred eighty-four million, eight hundred seventeen thousand, one hundred nine".