212040205 has 8 divisors (see below), whose sum is σ = 274021272. Its totient is φ = 156583488.

The previous prime is 212040203. The next prime is 212040221. The reversal of 212040205 is 502040212.

212040205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 27678121 + 184362084 = 5261^2 + 13578^2 .

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 212040205 - 2¹ = 212040203 is a prime.

It is a super-2 number, since 2×212040205² = 89922097072884050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212040203) 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, 1631014 + ... + 1631143.

It is an arithmetic number, because the mean of its divisors is an integer number (34252659).

Almost surely, 2^212040205 is an apocalyptic number.

It is an amenable number.

212040205 is a deficient number, since it is larger than the sum of its proper divisors (61981067).

212040205 is a wasteful number, since it uses less digits than its factorization.

212040205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3262175.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 212040205 is about 14561.6003584771. The cubic root of 212040205 is about 596.3108870456.

Adding to 212040205 its reverse (502040212), we get a palindrome (714080417).

The spelling of 212040205 in words is "two hundred twelve million, forty thousand, two hundred five".