221724682228 has 24 divisors (see below), whose sum is σ = 443616286400. Its totient is φ = 94989094848.

The previous prime is 221724682187. The next prime is 221724682241. The reversal of 221724682228 is 822286427122.

It is a super-3 number, since 3×221724682228³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1414593 + ... + 1563496.

Almost surely, 2^221724682228 is an apocalyptic number.

221724682228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

221724682228 is an abundant number, since it is smaller than the sum of its proper divisors (221891604172).

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

221724682228 is a wasteful number, since it uses less digits than its factorization.

221724682228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2980759 (or 2980757 counting only the distinct ones).

The product of its digits is 688128, while the sum is 46.

The spelling of 221724682228 in words is "two hundred twenty-one billion, seven hundred twenty-four million, six hundred eighty-two thousand, two hundred twenty-eight".