212204525 has 12 divisors (see below), whose sum is σ = 283375092. Its totient is φ = 156704640.

The previous prime is 212204501. The next prime is 212204537. The reversal of 212204525 is 525402212.

It can be written as a sum of positive squares in 6 ways, for example, as 2910436 + 209294089 = 1706^2 + 14467^2 .

It is not a de Polignac number, because 212204525 - 2¹⁶ = 212138989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212204525.

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 11 ways as a sum of consecutive naturals, for example, 326144 + ... + 326793.

It is an arithmetic number, because the mean of its divisors is an integer number (23614591).

Almost surely, 2^212204525 is an apocalyptic number.

212204525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212204525 is a deficient number, since it is larger than the sum of its proper divisors (71170567).

212204525 is a wasteful number, since it uses less digits than its factorization.

212204525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652960 (or 652955 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 212204525 is about 14567.2415027691. The cubic root of 212204525 is about 596.4648837913.

Adding to 212204525 its reverse (525402212), we get a palindrome (737606737).

The spelling of 212204525 in words is "two hundred twelve million, two hundred four thousand, five hundred twenty-five".