212921338 has 8 divisors (see below), whose sum is σ = 365008032. Its totient is φ = 91251996.

The previous prime is 212921329. The next prime is 212921351. The reversal of 212921338 is 833129212.

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

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, 7604320 + ... + 7604347.

It is an arithmetic number, because the mean of its divisors is an integer number (45626004).

Almost surely, 2^212921338 is an apocalyptic number.

212921338 is a deficient number, since it is larger than the sum of its proper divisors (152086694).

212921338 is a wasteful number, since it uses less digits than its factorization.

212921338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15208676.

The product of its digits is 5184, while the sum is 31.

The square root of 212921338 is about 14591.8243547543. The cubic root of 212921338 is about 597.1357354424.

The spelling of 212921338 in words is "two hundred twelve million, nine hundred twenty-one thousand, three hundred thirty-eight".