31680061 has 16 divisors (see below), whose sum is σ = 39066624. Its totient is φ = 25069824.

The previous prime is 31680053. The next prime is 31680073. The reversal of 31680061 is 16008613.

It is a cyclic number.

It is not a de Polignac number, because 31680061 - 2³ = 31680053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31680001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3796 + ... + 8818.

It is an arithmetic number, because the mean of its divisors is an integer number (2441664).

Almost surely, 2^31680061 is an apocalyptic number.

It is an amenable number.

31680061 is a deficient number, since it is larger than the sum of its proper divisors (7386563).

31680061 is a wasteful number, since it uses less digits than its factorization.

31680061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 31680061 is about 5628.5043306370. The cubic root of 31680061 is about 316.4185988269.

Adding to 31680061 its reverse (16008613), we get a palindrome (47688674).

The spelling of 31680061 in words is "thirty-one million, six hundred eighty thousand, sixty-one".