221488049 has 2 divisors, whose sum is σ = 221488050. Its totient is φ = 221488048.

The previous prime is 221487991. The next prime is 221488061. The reversal of 221488049 is 940884122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143041600 + 78446449 = 11960^2 + 8857^2 .

It is a cyclic number.

It is not a de Polignac number, because 221488049 - 2¹² = 221483953 is a prime.

It is not a weakly prime, because it can be changed into another prime (221482049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110744024 + 110744025.

It is an arithmetic number, because the mean of its divisors is an integer number (110744025).

Almost surely, 2^221488049 is an apocalyptic number.

It is an amenable number.

221488049 is a deficient number, since it is larger than the sum of its proper divisors (1).

221488049 is an equidigital number, since it uses as much as digits as its factorization.

221488049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 221488049 is about 14882.4745590241. The cubic root of 221488049 is about 605.0390877007.

The spelling of 221488049 in words is "two hundred twenty-one million, four hundred eighty-eight thousand, forty-nine".