221223232240 has 40 divisors (see below), whose sum is σ = 514594929888. Its totient is φ = 88446124800.

The previous prime is 221223232189. The next prime is 221223232273. The reversal of 221223232240 is 42232322122.

221223232240 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509236 + ... + 837715.

Almost surely, 2^221223232240 is an apocalyptic number.

221223232240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221223232240 is an abundant number, since it is smaller than the sum of its proper divisors (293371697648).

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

221223232240 is a wasteful number, since it uses less digits than its factorization.

221223232240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349017 (or 1349011 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 221223232240 its reverse (42232322122), we get a palindrome (263455554362).

The spelling of 221223232240 in words is "two hundred twenty-one billion, two hundred twenty-three million, two hundred thirty-two thousand, two hundred forty".