221983986853 has 2 divisors, whose sum is σ = 221983986854. Its totient is φ = 221983986852.

The previous prime is 221983986841. The next prime is 221983986907. The reversal of 221983986853 is 358689389122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178372764964 + 43611221889 = 422342^2 + 208833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221983986853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221983986953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110991993426 + 110991993427.

It is an arithmetic number, because the mean of its divisors is an integer number (110991993427).

Almost surely, 2^221983986853 is an apocalyptic number.

It is an amenable number.

221983986853 is a deficient number, since it is larger than the sum of its proper divisors (1).

221983986853 is an equidigital number, since it uses as much as digits as its factorization.

221983986853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44789760, while the sum is 64.

The spelling of 221983986853 in words is "two hundred twenty-one billion, nine hundred eighty-three million, nine hundred eighty-six thousand, eight hundred fifty-three".