312231906 has 48 divisors (see below), whose sum is σ = 775008000. Its totient is φ = 88994304.

The previous prime is 312231869. The next prime is 312231929. The reversal of 312231906 is 609132213.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 312231906.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53815 + ... + 59333.

It is an arithmetic number, because the mean of its divisors is an integer number (16146000).

Almost surely, 2^312231906 is an apocalyptic number.

312231906 is an abundant number, since it is smaller than the sum of its proper divisors (462776094).

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

312231906 is a wasteful number, since it uses less digits than its factorization.

312231906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5983 (or 5980 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 312231906 is about 17670.0850592180. The cubic root of 312231906 is about 678.4102902076.

The spelling of 312231906 in words is "three hundred twelve million, two hundred thirty-one thousand, nine hundred six".