221563065349 has 2 divisors, whose sum is σ = 221563065350. Its totient is φ = 221563065348.

The previous prime is 221563065257. The next prime is 221563065371. The reversal of 221563065349 is 943560365122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219782816100 + 1780249249 = 468810^2 + 42193^2 .

It is a cyclic number.

It is not a de Polignac number, because 221563065349 - 2²⁷ = 221428847621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221563065299 and 221563065308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221563065389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110781532674 + 110781532675.

It is an arithmetic number, because the mean of its divisors is an integer number (110781532675).

Almost surely, 2^221563065349 is an apocalyptic number.

It is an amenable number.

221563065349 is a deficient number, since it is larger than the sum of its proper divisors (1).

221563065349 is an equidigital number, since it uses as much as digits as its factorization.

221563065349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 221563065349 in words is "two hundred twenty-one billion, five hundred sixty-three million, sixty-five thousand, three hundred forty-nine".