31981682 has 8 divisors (see below), whose sum is σ = 48182700. Its totient is φ = 15920784.

The previous prime is 31981639. The next prime is 31981711. The reversal of 31981682 is 28618913.

It can be written as a sum of positive squares in 2 ways, for example, as 31820881 + 160801 = 5641^2 + 401^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34457 + ... + 35372.

Almost surely, 2^31981682 is an apocalyptic number.

31981682 is a deficient number, since it is larger than the sum of its proper divisors (16201018).

31981682 is a wasteful number, since it uses less digits than its factorization.

31981682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70060.

The product of its digits is 20736, while the sum is 38.

The square root of 31981682 is about 5655.2349199657. The cubic root of 31981682 is about 317.4196196380.

The spelling of 31981682 in words is "thirty-one million, nine hundred eighty-one thousand, six hundred eighty-two".