31871368919 has 8 divisors (see below), whose sum is σ = 36342013680. Its totient is φ = 27689152896.

The previous prime is 31871368897. The next prime is 31871368933. The reversal of 31871368919 is 91986317813.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31871368919 is a prime.

It is a super-2 number, since 2×31871368919² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31871368979) 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, 72106949 + ... + 72107390.

It is an arithmetic number, because the mean of its divisors is an integer number (4542751710).

Almost surely, 2^31871368919 is an apocalyptic number.

31871368919 is a deficient number, since it is larger than the sum of its proper divisors (4470644761).

31871368919 is a wasteful number, since it uses less digits than its factorization.

31871368919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144214369.

The product of its digits is 1959552, while the sum is 56.

The spelling of 31871368919 in words is "thirty-one billion, eight hundred seventy-one million, three hundred sixty-eight thousand, nine hundred nineteen".