212203205 has 4 divisors (see below), whose sum is σ = 254643852. Its totient is φ = 169762560.

The previous prime is 212203193. The next prime is 212203223. The reversal of 212203205 is 502302212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 151019521 + 61183684 = 12289^2 + 7822^2 .

It is not a de Polignac number, because 212203205 - 2⁶ = 212203141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21220316 + ... + 21220325.

It is an arithmetic number, because the mean of its divisors is an integer number (63660963).

Almost surely, 2^212203205 is an apocalyptic number.

It is an amenable number.

212203205 is a deficient number, since it is larger than the sum of its proper divisors (42440647).

212203205 is an equidigital number, since it uses as much as digits as its factorization.

212203205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42440646.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 212203205 is about 14567.1961955621. The cubic root of 212203205 is about 596.4636470359.

Adding to 212203205 its reverse (502302212), we get a palindrome (714505417).

The spelling of 212203205 in words is "two hundred twelve million, two hundred three thousand, two hundred five".