31680413 has 8 divisors (see below), whose sum is σ = 32913216. Its totient is φ = 30469600.

The previous prime is 31680403. The next prime is 31680421. The reversal of 31680413 is 31408613.

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

It is a cyclic number.

It is not a de Polignac number, because 31680413 - 2⁶ = 31680349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31680403) 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, 2531 + ... + 8352.

It is an arithmetic number, because the mean of its divisors is an integer number (4114152).

Almost surely, 2^31680413 is an apocalyptic number.

It is an amenable number.

31680413 is a deficient number, since it is larger than the sum of its proper divisors (1232803).

31680413 is a wasteful number, since it uses less digits than its factorization.

31680413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10995.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 31680413 is about 5628.5355999585. The cubic root of 31680413 is about 316.4197707410.

The spelling of 31680413 in words is "thirty-one million, six hundred eighty thousand, four hundred thirteen".