212431225 has 6 divisors (see below), whose sum is σ = 263414750. Its totient is φ = 169944960.

The previous prime is 212431187. The next prime is 212431259. The reversal of 212431225 is 522134212.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 34715664 + 177715561 = 5892^2 + 13331^2 .

It is not a de Polignac number, because 212431225 - 2²³ = 204042617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212431196 and 212431205.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4248600 + ... + 4248649.

Almost surely, 2^212431225 is an apocalyptic number.

212431225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212431225 is a deficient number, since it is larger than the sum of its proper divisors (50983525).

212431225 is an equidigital number, since it uses as much as digits as its factorization.

212431225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8497259 (or 8497254 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 212431225 is about 14575.0205831759. The cubic root of 212431225 is about 596.6772111297.

Adding to 212431225 its reverse (522134212), we get a palindrome (734565437).

The spelling of 212431225 in words is "two hundred twelve million, four hundred thirty-one thousand, two hundred twenty-five".