212990918 has 8 divisors (see below), whose sum is σ = 365127312. Its totient is φ = 91281816.

The previous prime is 212990891. The next prime is 212990927. The reversal of 212990918 is 819099212.

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

It is a Curzon number.

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, 7606805 + ... + 7606832.

It is an arithmetic number, because the mean of its divisors is an integer number (45640914).

Almost surely, 2^212990918 is an apocalyptic number.

212990918 is a deficient number, since it is larger than the sum of its proper divisors (152136394).

212990918 is a wasteful number, since it uses less digits than its factorization.

212990918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15213646.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 212990918 is about 14594.2083718165. The cubic root of 212990918 is about 597.2007738268.

The spelling of 212990918 in words is "two hundred twelve million, nine hundred ninety thousand, nine hundred eighteen".