212681018 has 32 divisors (see below), whose sum is σ = 362672640. Its totient is φ = 92664000.

The previous prime is 212680991. The next prime is 212681039. The reversal of 212681018 is 810186212.

It is a Curzon number.

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 in 15 ways as a sum of consecutive naturals, for example, 72908 + ... + 75768.

It is an arithmetic number, because the mean of its divisors is an integer number (11333520).

Almost surely, 2^212681018 is an apocalyptic number.

212681018 is a deficient number, since it is larger than the sum of its proper divisors (149991622).

212681018 is a wasteful number, since it uses less digits than its factorization.

212681018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3014.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 212681018 is about 14583.5872815984. The cubic root of 212681018 is about 596.9109925318.

The spelling of 212681018 in words is "two hundred twelve million, six hundred eighty-one thousand, eighteen".