221534449 has 2 divisors, whose sum is σ = 221534450. Its totient is φ = 221534448.

The previous prime is 221534437. The next prime is 221534461. The reversal of 221534449 is 944435122.

221534449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (221534437) and next prime (221534461).

It can be written as a sum of positive squares in only one way, i.e., 212576400 + 8958049 = 14580^2 + 2993^2 .

It is a cyclic number.

It is not a de Polignac number, because 221534449 - 2¹⁹ = 221010161 is a prime.

It is not a weakly prime, because it can be changed into another prime (221534419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110767224 + 110767225.

It is an arithmetic number, because the mean of its divisors is an integer number (110767225).

Almost surely, 2^221534449 is an apocalyptic number.

It is an amenable number.

221534449 is a deficient number, since it is larger than the sum of its proper divisors (1).

221534449 is an equidigital number, since it uses as much as digits as its factorization.

221534449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 34.

The square root of 221534449 is about 14884.0333579309. The cubic root of 221534449 is about 605.0813350568.

The spelling of 221534449 in words is "two hundred twenty-one million, five hundred thirty-four thousand, four hundred forty-nine".