212321504 has 48 divisors (see below), whose sum is σ = 443394000. Its totient is φ = 99800064.

The previous prime is 212321489. The next prime is 212321509. The reversal of 212321504 is 405123212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212321509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82022 + ... + 84570.

It is an arithmetic number, because the mean of its divisors is an integer number (9237375).

Almost surely, 2^212321504 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 212321504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221697000).

212321504 is an abundant number, since it is smaller than the sum of its proper divisors (231072496).

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

212321504 is a wasteful number, since it uses less digits than its factorization.

212321504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715 (or 2707 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 212321504 is about 14571.2560886150. The cubic root of 212321504 is about 596.5744652568.

Adding to 212321504 its reverse (405123212), we get a palindrome (617444716).

The spelling of 212321504 in words is "two hundred twelve million, three hundred twenty-one thousand, five hundred four".