212231225 has 12 divisors (see below), whose sum is σ = 263365584. Its totient is φ = 169656720.

The previous prime is 212231219. The next prime is 212231231. The reversal of 212231225 is 522132212.

It is an interprime number because it is at equal distance from previous prime (212231219) and next prime (212231231).

It is not a de Polignac number, because 212231225 - 2⁶ = 212231161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212231197 and 212231206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44402 + ... + 48948.

It is an arithmetic number, because the mean of its divisors is an integer number (21947132).

Almost surely, 2^212231225 is an apocalyptic number.

212231225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212231225 is a deficient number, since it is larger than the sum of its proper divisors (51134359).

212231225 is a wasteful number, since it uses less digits than its factorization.

212231225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6424 (or 6419 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 212231225 is about 14568.1579137515. The cubic root of 212231225 is about 596.4898988792.

Adding to 212231225 its reverse (522132212), we get a palindrome (734363437).

The spelling of 212231225 in words is "two hundred twelve million, two hundred thirty-one thousand, two hundred twenty-five".