312181806 has 32 divisors (see below), whose sum is σ = 666673920. Its totient is φ = 97219584.

The previous prime is 312181801. The next prime is 312181813. The reversal of 312181806 is 608181213.

312181806 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312181801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20371 + ... + 32238.

It is an arithmetic number, because the mean of its divisors is an integer number (20833560).

Almost surely, 2^312181806 is an apocalyptic number.

312181806 is an abundant number, since it is smaller than the sum of its proper divisors (354492114).

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

312181806 is a wasteful number, since it uses less digits than its factorization.

312181806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52680.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 312181806 is about 17668.6673521236. The cubic root of 312181806 is about 678.3740028915.

The spelling of 312181806 in words is "three hundred twelve million, one hundred eighty-one thousand, eight hundred six".