405321222 has 8 divisors (see below), whose sum is σ = 810642456. Its totient is φ = 135107072.

The previous prime is 405321221. The next prime is 405321223. The reversal of 405321222 is 222123504.

It is an interprime number because it is at equal distance from previous prime (405321221) and next prime (405321223).

It is a sphenic number, since it is the product of 3 distinct primes.

405321222 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405321221) 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 3 ways as a sum of consecutive naturals, for example, 33776763 + ... + 33776774.

It is an arithmetic number, because the mean of its divisors is an integer number (101330307).

Almost surely, 2^405321222 is an apocalyptic number.

405321222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

405321222 is a wasteful number, since it uses less digits than its factorization.

405321222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67553542.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 405321222 is about 20132.5910404001. The cubic root of 405321222 is about 740.0591759349.

Adding to 405321222 its reverse (222123504), we get a palindrome (627444726).

The spelling of 405321222 in words is "four hundred five million, three hundred twenty-one thousand, two hundred twenty-two".