221600247949 has 2 divisors, whose sum is σ = 221600247950. Its totient is φ = 221600247948.

The previous prime is 221600247937. The next prime is 221600247991. The reversal of 221600247949 is 949742006122.

221600247949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218168397225 + 3431850724 = 467085^2 + 58582^2 .

It is a cyclic number.

It is not a de Polignac number, because 221600247949 - 2¹¹ = 221600245901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221600247899 and 221600247908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221600247049) by changing a digit.

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 as a sum of consecutive naturals, namely, 110800123974 + 110800123975.

It is an arithmetic number, because the mean of its divisors is an integer number (110800123975).

Almost surely, 2^221600247949 is an apocalyptic number.

It is an amenable number.

221600247949 is a deficient number, since it is larger than the sum of its proper divisors (1).

221600247949 is an equidigital number, since it uses as much as digits as its factorization.

221600247949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 221600247949 in words is "two hundred twenty-one billion, six hundred million, two hundred forty-seven thousand, nine hundred forty-nine".