31930206 has 96 divisors (see below), whose sum is σ = 82328064. Its totient is φ = 8078400.

The previous prime is 31930193. The next prime is 31930207. The reversal of 31930206 is 60203913.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31930207) 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 47 ways as a sum of consecutive naturals, for example, 309951 + ... + 310053.

It is an arithmetic number, because the mean of its divisors is an integer number (857584).

Almost surely, 2^31930206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31930206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41164032).

31930206 is an abundant number, since it is smaller than the sum of its proper divisors (50397858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31930206 is a wasteful number, since it uses less digits than its factorization.

31930206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 31930206 is about 5650.6819057526. The cubic root of 31930206 is about 317.2492276558.

The spelling of 31930206 in words is "thirty-one million, nine hundred thirty thousand, two hundred six".