221656775683 has 12 divisors (see below), whose sum is σ = 259576153200. Its totient is φ = 188716404912.

The previous prime is 221656775663. The next prime is 221656775719. The reversal of 221656775683 is 386577656122.

It is a happy number.

It is not a de Polignac number, because 221656775683 - 2¹³ = 221656767491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221656775633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15172591 + ... + 15187192.

It is an arithmetic number, because the mean of its divisors is an integer number (21631346100).

Almost surely, 2^221656775683 is an apocalyptic number.

221656775683 is a deficient number, since it is larger than the sum of its proper divisors (37919377517).

221656775683 is a wasteful number, since it uses less digits than its factorization.

221656775683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30359946 (or 30359939 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 58.

The spelling of 221656775683 in words is "two hundred twenty-one billion, six hundred fifty-six million, seven hundred seventy-five thousand, six hundred eighty-three".