221683883855 has 24 divisors (see below), whose sum is σ = 309689818128. Its totient is φ = 151895280768.

The previous prime is 221683883821. The next prime is 221683883879. The reversal of 221683883855 is 558388386122.

It is not a de Polignac number, because 221683883855 - 2¹⁰ = 221683882831 is a prime.

It is a super-2 number, since 2×221683883855² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221683883794 and 221683883803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25934 + ... + 666363.

It is an arithmetic number, because the mean of its divisors is an integer number (12903742422).

Almost surely, 2^221683883855 is an apocalyptic number.

221683883855 is a deficient number, since it is larger than the sum of its proper divisors (88005934273).

221683883855 is a wasteful number, since it uses less digits than its factorization.

221683883855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693623 (or 693616 counting only the distinct ones).

The product of its digits is 22118400, while the sum is 59.

The spelling of 221683883855 in words is "two hundred twenty-one billion, six hundred eighty-three million, eight hundred eighty-three thousand, eight hundred fifty-five".