212421852 has 84 divisors (see below), whose sum is σ = 563848096. Its totient is φ = 69984000.

The previous prime is 212421823. The next prime is 212421863. The reversal of 212421852 is 258124212.

212421852 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 282477 + ... + 283227.

Almost surely, 2^212421852 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212421852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281924048).

212421852 is an abundant number, since it is smaller than the sum of its proper divisors (351426244).

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

212421852 is an equidigital number, since it uses as much as digits as its factorization.

212421852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870 (or 853 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 212421852 is about 14574.6990363438. The cubic root of 212421852 is about 596.6684353675.

The spelling of 212421852 in words is "two hundred twelve million, four hundred twenty-one thousand, eight hundred fifty-two".