212304621 has 16 divisors (see below), whose sum is σ = 296372160. Its totient is φ = 135004800.

The previous prime is 212304611. The next prime is 212304643. The reversal of 212304621 is 126403212.

It is not a de Polignac number, because 212304621 - 2¹⁸ = 212042477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212304611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7480 + ... + 21921.

It is an arithmetic number, because the mean of its divisors is an integer number (18523260).

Almost surely, 2^212304621 is an apocalyptic number.

It is an amenable number.

212304621 is a deficient number, since it is larger than the sum of its proper divisors (84067539).

212304621 is a wasteful number, since it uses less digits than its factorization.

212304621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29516.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 212304621 is about 14570.6767516132. The cubic root of 212304621 is about 596.5586523920.

Adding to 212304621 its reverse (126403212), we get a palindrome (338707833).

The spelling of 212304621 in words is "two hundred twelve million, three hundred four thousand, six hundred twenty-one".