212921484 has 24 divisors (see below), whose sum is σ = 498104880. Its totient is φ = 70789824.

The previous prime is 212921483. The next prime is 212921491. The reversal of 212921484 is 484129212.

It is not an unprimeable number, because it can be changed into a prime (212921483) 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, 18139 + ... + 27474.

It is an arithmetic number, because the mean of its divisors is an integer number (20754370).

Almost surely, 2^212921484 is an apocalyptic number.

It is an amenable number.

212921484 is an abundant number, since it is smaller than the sum of its proper divisors (285183396).

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

212921484 is a wasteful number, since it uses less digits than its factorization.

212921484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46009 (or 46007 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 212921484 is about 14591.8293575549. The cubic root of 212921484 is about 597.1358719276.

The spelling of 212921484 in words is "two hundred twelve million, nine hundred twenty-one thousand, four hundred eighty-four".