212328805 has 8 divisors (see below), whose sum is σ = 274394232. Its totient is φ = 156796608.

The previous prime is 212328803. The next prime is 212328811. The reversal of 212328805 is 508823212.

It can be written as a sum of positive squares in 4 ways, for example, as 6320196 + 206008609 = 2514^2 + 14353^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212328805 - 2¹ = 212328803 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 (212328803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1633234 + ... + 1633363.

It is an arithmetic number, because the mean of its divisors is an integer number (34299279).

Almost surely, 2^212328805 is an apocalyptic number.

It is an amenable number.

212328805 is a deficient number, since it is larger than the sum of its proper divisors (62065427).

212328805 is a wasteful number, since it uses less digits than its factorization.

212328805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3266615.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 212328805 is about 14571.5066139367. The cubic root of 212328805 is about 596.5813032205.

The spelling of 212328805 in words is "two hundred twelve million, three hundred twenty-eight thousand, eight hundred five".