212566441 has 2 divisors, whose sum is σ = 212566442. Its totient is φ = 212566440.

The previous prime is 212566429. The next prime is 212566463. The reversal of 212566441 is 144665212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153660816 + 58905625 = 12396^2 + 7675^2 .

It is a cyclic number.

It is not a de Polignac number, because 212566441 - 2¹⁷ = 212435369 is a prime.

It is not a weakly prime, because it can be changed into another prime (212566421) 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 as a sum of consecutive naturals, namely, 106283220 + 106283221.

It is an arithmetic number, because the mean of its divisors is an integer number (106283221).

Almost surely, 2^212566441 is an apocalyptic number.

It is an amenable number.

212566441 is a deficient number, since it is larger than the sum of its proper divisors (1).

212566441 is an equidigital number, since it uses as much as digits as its factorization.

212566441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 212566441 is about 14579.6584665074. The cubic root of 212566441 is about 596.8037825941.

The spelling of 212566441 in words is "two hundred twelve million, five hundred sixty-six thousand, four hundred forty-one".