31685103 has 24 divisors (see below), whose sum is σ = 48588800. Its totient is φ = 19840464.

The previous prime is 31685089. The next prime is 31685113. The reversal of 31685103 is 30158613.

It is not a de Polignac number, because 31685103 - 2¹² = 31681007 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 (31685113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20988 + ... + 22446.

Almost surely, 2^31685103 is an apocalyptic number.

31685103 is a deficient number, since it is larger than the sum of its proper divisors (16903697).

31685103 is a wasteful number, since it uses less digits than its factorization.

31685103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611 (or 1608 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 31685103 is about 5628.9522115577. The cubic root of 31685103 is about 316.4353843369.

The spelling of 31685103 in words is "thirty-one million, six hundred eighty-five thousand, one hundred three".