212240041 has 4 divisors (see below), whose sum is σ = 228566212. Its totient is φ = 195913872.

The previous prime is 212240003. The next prime is 212240069. The reversal of 212240041 is 140042212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57760000 + 154480041 = 7600^2 + 12429^2 .

It is a cyclic number.

It is not a de Polignac number, because 212240041 - 2⁷ = 212239913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212239997 and 212240024.

It is not an unprimeable number, because it can be changed into a prime (212240071) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8163066 + ... + 8163091.

It is an arithmetic number, because the mean of its divisors is an integer number (57141553).

Almost surely, 2^212240041 is an apocalyptic number.

It is an amenable number.

212240041 is a deficient number, since it is larger than the sum of its proper divisors (16326171).

212240041 is a wasteful number, since it uses less digits than its factorization.

212240041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16326170.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 212240041 is about 14568.4604883289. The cubic root of 212240041 is about 596.4981580819.

Adding to 212240041 its reverse (140042212), we get a palindrome (352282253).

The spelling of 212240041 in words is "two hundred twelve million, two hundred forty thousand, forty-one".