212243441 has 4 divisors (see below), whose sum is σ = 213545712. Its totient is φ = 210941172.

The previous prime is 212243413. The next prime is 212243459. The reversal of 212243441 is 144342212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212243441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212243401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650891 + ... + 651216.

It is an arithmetic number, because the mean of its divisors is an integer number (53386428).

Almost surely, 2^212243441 is an apocalyptic number.

It is an amenable number.

212243441 is a deficient number, since it is larger than the sum of its proper divisors (1302271).

212243441 is a wasteful number, since it uses less digits than its factorization.

212243441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302270.

The product of its digits is 1536, while the sum is 23.

The square root of 212243441 is about 14568.5771782971. The cubic root of 212243441 is about 596.5013432850.

Adding to 212243441 its reverse (144342212), we get a palindrome (356585653).

The spelling of 212243441 in words is "two hundred twelve million, two hundred forty-three thousand, four hundred forty-one".