212051838 has 16 divisors (see below), whose sum is σ = 424250640. Its totient is φ = 70659456.

The previous prime is 212051821. The next prime is 212051849. The reversal of 212051838 is 838150212.

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 7 ways as a sum of consecutive naturals, for example, 24148 + ... + 31736.

It is an arithmetic number, because the mean of its divisors is an integer number (26515665).

Almost surely, 2^212051838 is an apocalyptic number.

212051838 is an abundant number, since it is smaller than the sum of its proper divisors (212198802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212051838 is a wasteful number, since it uses less digits than its factorization.

212051838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12251.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 212051838 is about 14561.9997939843. Note that the first 3 decimals coincide. The cubic root of 212051838 is about 596.3217918293.

The spelling of 212051838 in words is "two hundred twelve million, fifty-one thousand, eight hundred thirty-eight".