400321222 has 16 divisors (see below), whose sum is σ = 722384640. Its totient is φ = 162536328.

The previous prime is 400321213. The next prime is 400321303. The reversal of 400321222 is 222123004.

It is a junction number, because it is equal to n+sod(n) for n = 400321196 and 400321205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 752218 + ... + 752749.

It is an arithmetic number, because the mean of its divisors is an integer number (45149040).

Almost surely, 2^400321222 is an apocalyptic number.

400321222 is a deficient number, since it is larger than the sum of its proper divisors (322063418).

400321222 is a wasteful number, since it uses less digits than its factorization.

400321222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504995.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 400321222 is about 20008.0289384037. The cubic root of 400321222 is about 737.0034789499.

Adding to 400321222 its reverse (222123004), we get a palindrome (622444226).

The spelling of 400321222 in words is "four hundred million, three hundred twenty-one thousand, two hundred twenty-two".