1423022221 has 4 divisors (see below), whose sum is σ = 1435615452. Its totient is φ = 1410428992.

The previous prime is 1423022207. The next prime is 1423022273. The reversal of 1423022221 is 1222203241.

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 35832196 + 1387190025 = 5986^2 + 37245^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423022221 - 2⁷ = 1423022093 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 (1423026221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6296446 + ... + 6296671.

It is an arithmetic number, because the mean of its divisors is an integer number (358903863).

Almost surely, 2^1423022221 is an apocalyptic number.

It is an amenable number.

1423022221 is a deficient number, since it is larger than the sum of its proper divisors (12593231).

1423022221 is a wasteful number, since it uses less digits than its factorization.

1423022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12593230.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1423022221 is about 37722.9667576663. The cubic root of 1423022221 is about 1124.7877053897.

Adding to 1423022221 its reverse (1222203241), we get a palindrome (2645225462).

The spelling of 1423022221 in words is "one billion, four hundred twenty-three million, twenty-two thousand, two hundred twenty-one".