31328199 has 18 divisors (see below), whose sum is σ = 52640640. Its totient is φ = 17901576.

The previous prime is 31328191. The next prime is 31328203. The reversal of 31328199 is 99182313.

It is not a de Polignac number, because 31328199 - 2³ = 31328191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31328191) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 35079 + ... + 35960.

It is an arithmetic number, because the mean of its divisors is an integer number (2924480).

Almost surely, 2^31328199 is an apocalyptic number.

31328199 is a deficient number, since it is larger than the sum of its proper divisors (21312441).

31328199 is a wasteful number, since it uses less digits than its factorization.

31328199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71059 (or 71049 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 31328199 is about 5597.1599048089. The cubic root of 31328199 is about 315.2427758035.

The spelling of 31328199 in words is "thirty-one million, three hundred twenty-eight thousand, one hundred ninety-nine".