221054473 has 2 divisors, whose sum is σ = 221054474. Its totient is φ = 221054472.

The previous prime is 221054461. The next prime is 221054479. The reversal of 221054473 is 374450122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130576329 + 90478144 = 11427^2 + 9512^2 .

It is a cyclic number.

It is not a de Polignac number, because 221054473 - 2¹⁷ = 220923401 is a prime.

It is not a weakly prime, because it can be changed into another prime (221054479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110527236 + 110527237.

It is an arithmetic number, because the mean of its divisors is an integer number (110527237).

Almost surely, 2^221054473 is an apocalyptic number.

It is an amenable number.

221054473 is a deficient number, since it is larger than the sum of its proper divisors (1).

221054473 is an equidigital number, since it uses as much as digits as its factorization.

221054473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 221054473 is about 14867.9007596903. The cubic root of 221054473 is about 604.6440298320.

The spelling of 221054473 in words is "two hundred twenty-one million, fifty-four thousand, four hundred seventy-three".