1423213221 has 8 divisors (see below), whose sum is σ = 1997492320. Its totient is φ = 898871472.

The previous prime is 1423213217. The next prime is 1423213229. The reversal of 1423213221 is 1223123241.

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

It is not a de Polignac number, because 1423213221 - 2² = 1423213217 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 (1423213229) 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 7 ways as a sum of consecutive naturals, for example, 12484270 + ... + 12484383.

It is an arithmetic number, because the mean of its divisors is an integer number (249686540).

Almost surely, 2^1423213221 is an apocalyptic number.

It is an amenable number.

1423213221 is a deficient number, since it is larger than the sum of its proper divisors (574279099).

1423213221 is a wasteful number, since it uses less digits than its factorization.

1423213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24968675.

The product of its digits is 576, while the sum is 21.

The square root of 1423213221 is about 37725.4982869677. The cubic root of 1423213221 is about 1124.8380266561.

Adding to 1423213221 its reverse (1223123241), we get a palindrome (2646336462).

The spelling of 1423213221 in words is "one billion, four hundred twenty-three million, two hundred thirteen thousand, two hundred twenty-one".