212904219 has 24 divisors (see below), whose sum is σ = 318689280. Its totient is φ = 126277360.

The previous prime is 212904217. The next prime is 212904227. The reversal of 212904219 is 912409212.

It is a happy number.

It is not a de Polignac number, because 212904219 - 2¹ = 212904217 is a prime.

It is a super-2 number, since 2×212904219² = 90656412935999922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212904217) 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 23 ways as a sum of consecutive naturals, for example, 10822 + ... + 23300.

It is an arithmetic number, because the mean of its divisors is an integer number (13278720).

Almost surely, 2^212904219 is an apocalyptic number.

212904219 is a deficient number, since it is larger than the sum of its proper divisors (105785061).

212904219 is a wasteful number, since it uses less digits than its factorization.

212904219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12551 (or 12540 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 212904219 is about 14591.2377473606. The cubic root of 212904219 is about 597.1197316595.

The spelling of 212904219 in words is "two hundred twelve million, nine hundred four thousand, two hundred nineteen".