212661206 has 8 divisors (see below), whose sum is σ = 323029920. Its totient is φ = 104984568.

The previous prime is 212661181. The next prime is 212661221. The reversal of 212661206 is 602166212.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 672821 + ... + 673136.

It is an arithmetic number, because the mean of its divisors is an integer number (40378740).

Almost surely, 2^212661206 is an apocalyptic number.

212661206 is a deficient number, since it is larger than the sum of its proper divisors (110368714).

212661206 is a wasteful number, since it uses less digits than its factorization.

212661206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346038.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 212661206 is about 14582.9080090358. The cubic root of 212661206 is about 596.8924571560.

The spelling of 212661206 in words is "two hundred twelve million, six hundred sixty-one thousand, two hundred six".