221107489 has 2 divisors, whose sum is σ = 221107490. Its totient is φ = 221107488.

The previous prime is 221107477. The next prime is 221107577. The reversal of 221107489 is 984701122.

221107489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189971089 + 31136400 = 13783^2 + 5580^2 .

It is a cyclic number.

It is not a de Polignac number, because 221107489 - 2¹⁹ = 220583201 is a prime.

It is not a weakly prime, because it can be changed into another prime (221107409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110553744 + 110553745.

It is an arithmetic number, because the mean of its divisors is an integer number (110553745).

Almost surely, 2^221107489 is an apocalyptic number.

It is an amenable number.

221107489 is a deficient number, since it is larger than the sum of its proper divisors (1).

221107489 is an equidigital number, since it uses as much as digits as its factorization.

221107489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 221107489 is about 14869.6835541312. The cubic root of 221107489 is about 604.6923636886.

The spelling of 221107489 in words is "two hundred twenty-one million, one hundred seven thousand, four hundred eighty-nine".