423221213444 has 12 divisors (see below), whose sum is σ = 747970165068. Its totient is φ = 209515452000.

The previous prime is 423221213413. The next prime is 423221213447. The reversal of 423221213444 is 444312122324.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 283143180544 + 140078032900 = 532112^2 + 374270^2 .

It is a super-2 number, since 2×423221213444² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 423221213444.

It is not an unprimeable number, because it can be changed into a prime (423221213447) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 523788227 + ... + 523789034.

It is an arithmetic number, because the mean of its divisors is an integer number (62330847089).

Almost surely, 2^423221213444 is an apocalyptic number.

It is an amenable number.

423221213444 is a deficient number, since it is larger than the sum of its proper divisors (324748951624).

423221213444 is a wasteful number, since it uses less digits than its factorization.

423221213444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047577366 (or 1047577364 counting only the distinct ones).

The product of its digits is 36864, while the sum is 32.

Adding to 423221213444 its reverse (444312122324), we get a palindrome (867533335768).

The spelling of 423221213444 in words is "four hundred twenty-three billion, two hundred twenty-one million, two hundred thirteen thousand, four hundred forty-four".