212666441 has 8 divisors (see below), whose sum is σ = 238983360. Its totient is φ = 187772112.

The previous prime is 212666423. The next prime is 212666537. The reversal of 212666441 is 144666212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212666441 - 2¹⁰ = 212665417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212666398 and 212666407.

It is not an unprimeable number, because it can be changed into a prime (212666401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355331 + ... + 355928.

It is an arithmetic number, because the mean of its divisors is an integer number (29872920).

Almost surely, 2^212666441 is an apocalyptic number.

It is an amenable number.

212666441 is a deficient number, since it is larger than the sum of its proper divisors (26316919).

212666441 is a wasteful number, since it uses less digits than its factorization.

212666441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711295.

The product of its digits is 13824, while the sum is 32.

The square root of 212666441 is about 14583.0874988803. The cubic root of 212666441 is about 596.8973549406.

The spelling of 212666441 in words is "two hundred twelve million, six hundred sixty-six thousand, four hundred forty-one".