221055464441 has 6 divisors (see below), whose sum is σ = 257146152570. Its totient is φ = 189476112336.

The previous prime is 221055464437. The next prime is 221055464449. The reversal of 221055464441 is 144464550122.

It can be written as a sum of positive squares in only one way, i.e., 215694296041 + 5361168400 = 464429^2 + 73220^2 .

It is not a de Polignac number, because 221055464441 - 2² = 221055464437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221055464395 and 221055464404.

It is not an unprimeable number, because it can be changed into a prime (221055464449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2255667956 + ... + 2255668053.

It is an arithmetic number, because the mean of its divisors is an integer number (42857692095).

Almost surely, 2^221055464441 is an apocalyptic number.

It is an amenable number.

221055464441 is a deficient number, since it is larger than the sum of its proper divisors (36090688129).

221055464441 is an equidigital number, since it uses as much as digits as its factorization.

221055464441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4511336023 (or 4511336016 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 38.

The spelling of 221055464441 in words is "two hundred twenty-one billion, fifty-five million, four hundred sixty-four thousand, four hundred forty-one".