212342225 has 12 divisors (see below), whose sum is σ = 265863936. Its totient is φ = 168222480.

The previous prime is 212342209. The next prime is 212342237. The reversal of 212342225 is 522243212.

It is not a de Polignac number, because 212342225 - 2⁴ = 212342209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212342225.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38657 + ... + 43806.

It is an arithmetic number, because the mean of its divisors is an integer number (22155328).

Almost surely, 2^212342225 is an apocalyptic number.

212342225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212342225 is a deficient number, since it is larger than the sum of its proper divisors (53521711).

212342225 is a wasteful number, since it uses less digits than its factorization.

212342225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82576 (or 82571 counting only the distinct ones).

The product of its digits is 1920, while the sum is 23.

The square root of 212342225 is about 14571.9670943905. The cubic root of 212342225 is about 596.5938717027.

Adding to 212342225 its reverse (522243212), we get a palindrome (734585437).

The spelling of 212342225 in words is "two hundred twelve million, three hundred forty-two thousand, two hundred twenty-five".