404222213 has 4 divisors (see below), whose sum is σ = 418160940. Its totient is φ = 390283488.

The previous prime is 404222129. The next prime is 404222219. The reversal of 404222213 is 312222404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 249418849 + 154803364 = 15793^2 + 12442^2 .

It is a cyclic number.

It is not a de Polignac number, because 404222213 - 2¹² = 404218117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404222219) 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, 6969320 + ... + 6969377.

It is an arithmetic number, because the mean of its divisors is an integer number (104540235).

Almost surely, 2^404222213 is an apocalyptic number.

It is an amenable number.

404222213 is a deficient number, since it is larger than the sum of its proper divisors (13938727).

404222213 is a wasteful number, since it uses less digits than its factorization.

404222213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13938726.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 404222213 is about 20105.2782373187. The cubic root of 404222213 is about 739.3896921910.

Adding to 404222213 its reverse (312222404), we get a palindrome (716444617).

The spelling of 404222213 in words is "four hundred four million, two hundred twenty-two thousand, two hundred thirteen".