221055466 has 16 divisors (see below), whose sum is σ = 334055304. Its totient is φ = 109707264.

The previous prime is 221055463. The next prime is 221055467. The reversal of 221055466 is 664550122.

221055466 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 218182441 + 2873025 = 14771^2 + 1695^2 .

It is not an unprimeable number, because it can be changed into a prime (221055463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191146 + ... + 192298.

Almost surely, 2^221055466 is an apocalyptic number.

221055466 is a deficient number, since it is larger than the sum of its proper divisors (112999838).

221055466 is a wasteful number, since it uses less digits than its factorization.

221055466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 221055466 is about 14867.9341537417. The cubic root of 221055466 is about 604.6449352056.

The spelling of 221055466 in words is "two hundred twenty-one million, fifty-five thousand, four hundred sixty-six".