212245225 has 12 divisors (see below), whose sum is σ = 263367196. Its totient is φ = 169678080.

The previous prime is 212245217. The next prime is 212245259. The reversal of 212245225 is 522542212.

It can be written as a sum of positive squares in 6 ways, for example, as 2111209 + 210134016 = 1453^2 + 14496^2 .

It is not a de Polignac number, because 212245225 - 2³ = 212245217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212245225.

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, 60109 + ... + 63541.

Almost surely, 2^212245225 is an apocalyptic number.

212245225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212245225 is a deficient number, since it is larger than the sum of its proper divisors (51121971).

212245225 is a wasteful number, since it uses less digits than its factorization.

212245225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5916 (or 5911 counting only the distinct ones).

The product of its digits is 3200, while the sum is 25.

The square root of 212245225 is about 14568.6384058360. The cubic root of 212245225 is about 596.5030145662.

Adding to 212245225 its reverse (522542212), we get a palindrome (734787437).

The spelling of 212245225 in words is "two hundred twelve million, two hundred forty-five thousand, two hundred twenty-five".