221055049 has 2 divisors, whose sum is σ = 221055050. Its totient is φ = 221055048.

The previous prime is 221055031. The next prime is 221055077. The reversal of 221055049 is 940550122.

It is an a-pointer prime, because the next prime (221055077) can be obtained adding 221055049 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166590649 + 54464400 = 12907^2 + 7380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221055049 is a prime.

It is not a weakly prime, because it can be changed into another prime (221055019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110527524 + 110527525.

It is an arithmetic number, because the mean of its divisors is an integer number (110527525).

Almost surely, 2^221055049 is an apocalyptic number.

It is an amenable number.

221055049 is a deficient number, since it is larger than the sum of its proper divisors (1).

221055049 is an equidigital number, since it uses as much as digits as its factorization.

221055049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 221055049 is about 14867.9201302670. The cubic root of 221055049 is about 604.6445550037.

The spelling of 221055049 in words is "two hundred twenty-one million, fifty-five thousand, forty-nine".