212538 has 8 divisors (see below), whose sum is σ = 425088. Its totient is φ = 70844.

The previous prime is 212507. The next prime is 212557. The reversal of 212538 is 835212.

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

212538 is an admirable number.

It is an unprimeable number.

212538 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17706 + ... + 17717.

It is an arithmetic number, because the mean of its divisors is an integer number (53136).

2²¹²⁵³⁸ is an apocalyptic number.

212538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

212538 is a wasteful number, since it uses less digits than its factorization.

212538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35428.

The product of its digits is 480, while the sum is 21.

The square root of 212538 is about 461.0184378092. The cubic root of 212538 is about 59.6777164323.

The spelling of 212538 in words is "two hundred twelve thousand, five hundred thirty-eight".