212093805 has 96 divisors (see below), whose sum is σ = 442903680. Its totient is φ = 85639680.

The previous prime is 212093803. The next prime is 212093821. The reversal of 212093805 is 508390212.

It is a happy number.

212093805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212093805 - 2¹ = 212093803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212093803) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 298791 + ... + 299499.

It is an arithmetic number, because the mean of its divisors is an integer number (4613580).

Almost surely, 2^212093805 is an apocalyptic number.

It is an amenable number.

212093805 is an abundant number, since it is smaller than the sum of its proper divisors (230809875).

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

212093805 is a wasteful number, since it uses less digits than its factorization.

212093805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 212093805 is about 14563.4406992304. The cubic root of 212093805 is about 596.3611284150.

The spelling of 212093805 in words is "two hundred twelve million, ninety-three thousand, eight hundred five".