212222305 has 32 divisors (see below), whose sum is σ = 285413760. Its totient is φ = 150543360.

The previous prime is 212222303. The next prime is 212222321. The reversal of 212222305 is 503222212.

It is not a de Polignac number, because 212222305 - 2¹ = 212222303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (212222303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 534367 + ... + 534763.

It is an arithmetic number, because the mean of its divisors is an integer number (8919180).

Almost surely, 2^212222305 is an apocalyptic number.

It is an amenable number.

212222305 is a deficient number, since it is larger than the sum of its proper divisors (73191455).

212222305 is a wasteful number, since it uses less digits than its factorization.

212222305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 212222305 is about 14567.8517633864. The cubic root of 212222305 is about 596.4815420120.

Adding to 212222305 its reverse (503222212), we get a palindrome (715444517).

The spelling of 212222305 in words is "two hundred twelve million, two hundred twenty-two thousand, three hundred five".