31983271491 has 8 divisors (see below), whose sum is σ = 43796912464. Its totient is φ = 20745905760.

The previous prime is 31983271471. The next prime is 31983271519. The reversal of 31983271491 is 19417238913.

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

It is not a de Polignac number, because 31983271491 - 2⁷ = 31983271363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31983271491.

It is not an unprimeable number, because it can be changed into a prime (31983271421) 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, 144068680 + ... + 144068901.

It is an arithmetic number, because the mean of its divisors is an integer number (5474614058).

Almost surely, 2^31983271491 is an apocalyptic number.

31983271491 is a deficient number, since it is larger than the sum of its proper divisors (11813640973).

31983271491 is a wasteful number, since it uses less digits than its factorization.

31983271491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288137621.

The product of its digits is 326592, while the sum is 48.

The spelling of 31983271491 in words is "thirty-one billion, nine hundred eighty-three million, two hundred seventy-one thousand, four hundred ninety-one".