212420424 has 32 divisors (see below), whose sum is σ = 531558720. Its totient is φ = 70739136.

The previous prime is 212420419. The next prime is 212420443. The reversal of 212420424 is 424024212.

It is a self number, because there is not a number n which added to its sum of digits gives 212420424.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25734 + ... + 32970.

It is an arithmetic number, because the mean of its divisors is an integer number (16611210).

Almost surely, 2^212420424 is an apocalyptic number.

212420424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

212420424 is an abundant number, since it is smaller than the sum of its proper divisors (319138296).

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

212420424 is a wasteful number, since it uses less digits than its factorization.

212420424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8469 (or 8465 counting only the distinct ones).

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

The square root of 212420424 is about 14574.6500472567. The cubic root of 212420424 is about 596.6670983355.

Adding to 212420424 its reverse (424024212), we get a palindrome (636444636).

The spelling of 212420424 in words is "two hundred twelve million, four hundred twenty thousand, four hundred twenty-four".