221048389 has 2 divisors, whose sum is σ = 221048390. Its totient is φ = 221048388.

The previous prime is 221048357. The next prime is 221048393. The reversal of 221048389 is 983840122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186732225 + 34316164 = 13665^2 + 5858^2 .

It is a cyclic number.

It is not a de Polignac number, because 221048389 - 2⁵ = 221048357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221042389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110524194 + 110524195.

It is an arithmetic number, because the mean of its divisors is an integer number (110524195).

Almost surely, 2^221048389 is an apocalyptic number.

It is an amenable number.

221048389 is a deficient number, since it is larger than the sum of its proper divisors (1).

221048389 is an equidigital number, since it uses as much as digits as its factorization.

221048389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 221048389 is about 14867.6961564326. The cubic root of 221048389 is about 604.6384826503.

The spelling of 221048389 in words is "two hundred twenty-one million, forty-eight thousand, three hundred eighty-nine".