221233005 has 64 divisors (see below), whose sum is σ = 452190720. Its totient is φ = 100528128.

The previous prime is 221233003. The next prime is 221233009. The reversal of 221233005 is 500332122.

It is not a de Polignac number, because 221233005 - 2¹ = 221233003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221233003) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 181779 + ... + 182991.

It is an arithmetic number, because the mean of its divisors is an integer number (7065480).

Almost surely, 2^221233005 is an apocalyptic number.

It is an amenable number.

221233005 is an abundant number, since it is smaller than the sum of its proper divisors (230957715).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221233005 is a wasteful number, since it uses less digits than its factorization.

221233005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427 (or 1421 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 221233005 is about 14873.9034889971. The cubic root of 221233005 is about 604.8067638684.

Adding to 221233005 its reverse (500332122), we get a palindrome (721565127).

The spelling of 221233005 in words is "two hundred twenty-one million, two hundred thirty-three thousand, five".