212544245 has 16 divisors (see below), whose sum is σ = 260263920. Its totient is φ = 166593024.

The previous prime is 212544229. The next prime is 212544247. The reversal of 212544245 is 542445212.

It can be written as a sum of positive squares in 8 ways, for example, as 14691889 + 197852356 = 3833^2 + 14066^2 .

It is a cyclic number.

It is not a de Polignac number, because 212544245 - 2⁴ = 212544229 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212544247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55451 + ... + 59159.

It is an arithmetic number, because the mean of its divisors is an integer number (16266495).

Almost surely, 2^212544245 is an apocalyptic number.

It is an amenable number.

212544245 is a deficient number, since it is larger than the sum of its proper divisors (47719675).

212544245 is a wasteful number, since it uses less digits than its factorization.

212544245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944.

The product of its digits is 12800, while the sum is 29.

The square root of 212544245 is about 14578.8972491063. The cubic root of 212544245 is about 596.7830092965.

Adding to 212544245 its reverse (542445212), we get a palindrome (754989457).

The spelling of 212544245 in words is "two hundred twelve million, five hundred forty-four thousand, two hundred forty-five".