212663441 has 4 divisors (see below), whose sum is σ = 219523584. Its totient is φ = 205803300.

The previous prime is 212663413. The next prime is 212663443. The reversal of 212663441 is 144366212.

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-212663441 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 (212663443) 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, 3430025 + ... + 3430086.

It is an arithmetic number, because the mean of its divisors is an integer number (54880896).

Almost surely, 2^212663441 is an apocalyptic number.

It is an amenable number.

212663441 is a deficient number, since it is larger than the sum of its proper divisors (6860143).

212663441 is an equidigital number, since it uses as much as digits as its factorization.

212663441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6860142.

The product of its digits is 6912, while the sum is 29.

The square root of 212663441 is about 14582.9846396408. The cubic root of 212663441 is about 596.8945481971.

The spelling of 212663441 in words is "two hundred twelve million, six hundred sixty-three thousand, four hundred forty-one".