221232423 has 8 divisors (see below), whose sum is σ = 307801728. Its totient is φ = 141075704.

The previous prime is 221232397. The next prime is 221232437. The reversal of 221232423 is 324232122.

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

It is a cyclic number.

It is not a de Polignac number, because 221232423 - 2¹³ = 221224231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221232423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232443) 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, 1603065 + ... + 1603202.

It is an arithmetic number, because the mean of its divisors is an integer number (38475216).

Almost surely, 2^221232423 is an apocalyptic number.

221232423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221232423 is a deficient number, since it is larger than the sum of its proper divisors (86569305).

221232423 is a wasteful number, since it uses less digits than its factorization.

221232423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206293.

The product of its digits is 1152, while the sum is 21.

The square root of 221232423 is about 14873.8839245168. The cubic root of 221232423 is about 604.8062335107.

Adding to 221232423 its reverse (324232122), we get a palindrome (545464545).

The spelling of 221232423 in words is "two hundred twenty-one million, two hundred thirty-two thousand, four hundred twenty-three".