31680671 has 8 divisors (see below), whose sum is σ = 34647888. Its totient is φ = 28728000.

The previous prime is 31680661. The next prime is 31680689. The reversal of 31680671 is 17608613.

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-31680671 is a prime.

It is a super-3 number, since 3×31680671³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31680631) 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, 1211 + ... + 8051.

It is an arithmetic number, because the mean of its divisors is an integer number (4330986).

Almost surely, 2^31680671 is an apocalyptic number.

31680671 is a deficient number, since it is larger than the sum of its proper divisors (2967217).

31680671 is a wasteful number, since it uses less digits than its factorization.

31680671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7273.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 31680671 is about 5628.5585188394. The cubic root of 31680671 is about 316.4206296953.

The spelling of 31680671 in words is "thirty-one million, six hundred eighty thousand, six hundred seventy-one".