212424225 has 48 divisors (see below), whose sum is σ = 380308992. Its totient is φ = 104002560.

The previous prime is 212424203. The next prime is 212424227. The reversal of 212424225 is 522424212.

It is not a de Polignac number, because 212424225 - 2⁷ = 212424097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212424195 and 212424204.

It is not an unprimeable number, because it can be changed into a prime (212424227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 216937 + ... + 217913.

It is an arithmetic number, because the mean of its divisors is an integer number (7923104).

Almost surely, 2^212424225 is an apocalyptic number.

212424225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212424225 is a deficient number, since it is larger than the sum of its proper divisors (167884767).

212424225 is a wasteful number, since it uses less digits than its factorization.

212424225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226 (or 1221 counting only the distinct ones).

The product of its digits is 2560, while the sum is 24.

The square root of 212424225 is about 14574.7804443154. The cubic root of 212424225 is about 596.6706571868.

Adding to 212424225 its reverse (522424212), we get a palindrome (734848437).

The spelling of 212424225 in words is "two hundred twelve million, four hundred twenty-four thousand, two hundred twenty-five".