1423423221 has 8 divisors (see below), whose sum is σ = 2070433824. Its totient is φ = 862680720.

The previous prime is 1423423219. The next prime is 1423423223. The reversal of 1423423221 is 1223243241.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1423423219) and next prime (1423423223).

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

It is not a de Polignac number, because 1423423221 - 2¹ = 1423423219 is a prime.

It is a super-2 number, since 2×1423423221² = 4052267332164029682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1423423191 and 1423423200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423423223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21566986 + ... + 21567051.

It is an arithmetic number, because the mean of its divisors is an integer number (258804228).

Almost surely, 2^1423423221 is an apocalyptic number.

1423423221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1423423221 is a deficient number, since it is larger than the sum of its proper divisors (647010603).

1423423221 is a wasteful number, since it uses less digits than its factorization.

1423423221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43134051.

The product of its digits is 2304, while the sum is 24.

The square root of 1423423221 is about 37728.2814477416. The cubic root of 1423423221 is about 1124.8933485069.

Adding to 1423423221 its reverse (1223243241), we get a palindrome (2646666462).

The spelling of 1423423221 in words is "one billion, four hundred twenty-three million, four hundred twenty-three thousand, two hundred twenty-one".