212246525 has 6 divisors (see below), whose sum is σ = 263185722. Its totient is φ = 169797200.

The previous prime is 212246519. The next prime is 212246557. The reversal of 212246525 is 525642212.

It can be written as a sum of positive squares in 3 ways, for example, as 27857284 + 184389241 = 5278^2 + 13579^2 .

It is not a de Polignac number, because 212246525 - 2¹⁶ = 212180989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4244906 + ... + 4244955.

It is an arithmetic number, because the mean of its divisors is an integer number (43864287).

Almost surely, 2^212246525 is an apocalyptic number.

212246525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212246525 is a deficient number, since it is larger than the sum of its proper divisors (50939197).

212246525 is an equidigital number, since it uses as much as digits as its factorization.

212246525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8489871 (or 8489866 counting only the distinct ones).

The product of its digits is 9600, while the sum is 29.

The square root of 212246525 is about 14568.6830221541. The cubic root of 212246525 is about 596.5042324221.

Adding to 212246525 its reverse (525642212), we get a palindrome (737888737).

The spelling of 212246525 in words is "two hundred twelve million, two hundred forty-six thousand, five hundred twenty-five".