212222449 has 4 divisors (see below), whose sum is σ = 221449536. Its totient is φ = 202995364.

The previous prime is 212222447. The next prime is 212222471. The reversal of 212222449 is 944222212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212222449 - 2¹ = 212222447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212222447) 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 3 ways as a sum of consecutive naturals, for example, 4613509 + ... + 4613554.

It is an arithmetic number, because the mean of its divisors is an integer number (55362384).

Almost surely, 2^212222449 is an apocalyptic number.

It is an amenable number.

212222449 is a deficient number, since it is larger than the sum of its proper divisors (9227087).

212222449 is an equidigital number, since it uses as much as digits as its factorization.

212222449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9227086.

The product of its digits is 4608, while the sum is 28.

The square root of 212222449 is about 14567.8567057752. The cubic root of 212222449 is about 596.4816769230.

The spelling of 212222449 in words is "two hundred twelve million, two hundred twenty-two thousand, four hundred forty-nine".