212442420 has 96 divisors (see below), whose sum is σ = 629153280. Its totient is φ = 53412480.

The previous prime is 212442413. The next prime is 212442427. The reversal of 212442420 is 24244212.

212442420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212442413) and next prime (212442427).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212442427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 377059 + ... + 377621.

It is an arithmetic number, because the mean of its divisors is an integer number (6553680).

Almost surely, 2^212442420 is an apocalyptic number.

212442420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212442420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314576640).

212442420 is an abundant number, since it is smaller than the sum of its proper divisors (416710860).

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

212442420 is a wasteful number, since it uses less digits than its factorization.

212442420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925 (or 923 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 212442420 is about 14575.4046256013. The cubic root of 212442420 is about 596.6876924577.

Adding to 212442420 its reverse (24244212), we get a palindrome (236686632).

It can be divided in two parts, 2124 and 42420, that added together give a palindrome (44544).

The spelling of 212442420 in words is "two hundred twelve million, four hundred forty-two thousand, four hundred twenty".