221188049 has 2 divisors, whose sum is σ = 221188050. Its totient is φ = 221188048.

The previous prime is 221188039. The next prime is 221188103. The reversal of 221188049 is 940881122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220819600 + 368449 = 14860^2 + 607^2 .

It is a cyclic number.

It is not a de Polignac number, because 221188049 - 2⁸ = 221187793 is a prime.

It is not a weakly prime, because it can be changed into another prime (221188039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110594024 + 110594025.

It is an arithmetic number, because the mean of its divisors is an integer number (110594025).

Almost surely, 2^221188049 is an apocalyptic number.

It is an amenable number.

221188049 is a deficient number, since it is larger than the sum of its proper divisors (1).

221188049 is an equidigital number, since it uses as much as digits as its factorization.

221188049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 221188049 is about 14872.3921747646. The cubic root of 221188049 is about 604.7657941906.

The spelling of 221188049 in words is "two hundred twenty-one million, one hundred eighty-eight thousand, forty-nine".