31668206 has 8 divisors (see below), whose sum is σ = 47938440. Its totient is φ = 15688728.

The previous prime is 31668199. The next prime is 31668209. The reversal of 31668206 is 60286613.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31668209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72416 + ... + 72851.

It is an arithmetic number, because the mean of its divisors is an integer number (5992305).

Almost surely, 2^31668206 is an apocalyptic number.

31668206 is a deficient number, since it is larger than the sum of its proper divisors (16270234).

31668206 is a wasteful number, since it uses less digits than its factorization.

31668206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145378.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 31668206 is about 5627.4511104051. The cubic root of 31668206 is about 316.3791248868.

The spelling of 31668206 in words is "thirty-one million, six hundred sixty-eight thousand, two hundred six".