212612266 has 4 divisors (see below), whose sum is σ = 318918402. Its totient is φ = 106306132.

The previous prime is 212612243. The next prime is 212612287. The reversal of 212612266 is 662216212.

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

It can be written as a sum of positive squares in only one way, i.e., 212547241 + 65025 = 14579^2 + 255^2 .

It is an unprimeable number.

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, 53153065 + ... + 53153068.

Almost surely, 2^212612266 is an apocalyptic number.

212612266 is a deficient number, since it is larger than the sum of its proper divisors (106306136).

212612266 is a wasteful number, since it uses less digits than its factorization.

212612266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106306135.

The product of its digits is 3456, while the sum is 28.

The square root of 212612266 is about 14581.2299206891. The cubic root of 212612266 is about 596.8466657639.

Adding to 212612266 its reverse (662216212), we get a palindrome (874828478).

It can be divided in two parts, 212612 and 266, that added together give a triangular number (212878 = T₆₅₂).

The spelling of 212612266 in words is "two hundred twelve million, six hundred twelve thousand, two hundred sixty-six".