31984471 has 2 divisors, whose sum is σ = 31984472. Its totient is φ = 31984470.

The previous prime is 31984457. The next prime is 31984483. The reversal of 31984471 is 17448913.

It is a strong prime.

It is an emirp because it is prime and its reverse (17448913) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31984471 is a prime.

It is a super-3 number, since 3×31984471³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31984471.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31984441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15992235 + 15992236.

It is an arithmetic number, because the mean of its divisors is an integer number (15992236).

Almost surely, 2^31984471 is an apocalyptic number.

31984471 is a deficient number, since it is larger than the sum of its proper divisors (1).

31984471 is an equidigital number, since it uses as much as digits as its factorization.

31984471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 31984471 is about 5655.4815002792. The cubic root of 31984471 is about 317.4288463530.

The spelling of 31984471 in words is "thirty-one million, nine hundred eighty-four thousand, four hundred seventy-one".