31144783917 has 8 divisors (see below), whose sum is σ = 44720715424. Its totient is φ = 19166020848.

The previous prime is 31144783903. The next prime is 31144783927. The reversal of 31144783917 is 71938744113.

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

It is not a de Polignac number, because 31144783917 - 2³² = 26849816621 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 (31144783927) 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, 399292063 + ... + 399292140.

It is an arithmetic number, because the mean of its divisors is an integer number (5590089428).

Almost surely, 2^31144783917 is an apocalyptic number.

It is an amenable number.

31144783917 is a deficient number, since it is larger than the sum of its proper divisors (13575931507).

31144783917 is a wasteful number, since it uses less digits than its factorization.

31144783917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798584219.

The product of its digits is 508032, while the sum is 48.

The spelling of 31144783917 in words is "thirty-one billion, one hundred forty-four million, seven hundred eighty-three thousand, nine hundred seventeen".