212202005 has 4 divisors (see below), whose sum is σ = 254642412. Its totient is φ = 169761600.

The previous prime is 212201989. The next prime is 212202017. The reversal of 212202005 is 500202212.

212202005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 105555076 + 106646929 = 10274^2 + 10327^2 .

It is not a de Polignac number, because 212202005 - 2⁴ = 212201989 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, 21220196 + ... + 21220205.

It is an arithmetic number, because the mean of its divisors is an integer number (63660603).

Almost surely, 2^212202005 is an apocalyptic number.

It is an amenable number.

212202005 is a deficient number, since it is larger than the sum of its proper divisors (42440407).

212202005 is an equidigital number, since it uses as much as digits as its factorization.

212202005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42440406.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 212202005 is about 14567.1550070698. The cubic root of 212202005 is about 596.4625227084.

Adding to 212202005 its reverse (500202212), we get a palindrome (712404217).

The spelling of 212202005 in words is "two hundred twelve million, two hundred two thousand, five".