221255563 has 8 divisors (see below), whose sum is σ = 224467200. Its totient is φ = 218065320.

The previous prime is 221255543. The next prime is 221255569. The reversal of 221255563 is 365552122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221255563 - 2¹³ = 221247371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221255569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16098 + ... + 26488.

It is an arithmetic number, because the mean of its divisors is an integer number (28058400).

Almost surely, 2^221255563 is an apocalyptic number.

221255563 is a deficient number, since it is larger than the sum of its proper divisors (3211637).

221255563 is a wasteful number, since it uses less digits than its factorization.

221255563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10697.

The product of its digits is 18000, while the sum is 31.

The square root of 221255563 is about 14874.6617776674. The cubic root of 221255563 is about 604.8273195223.

It can be divided in two parts, 2212 and 55563, that added together give a palindrome (57775).

The spelling of 221255563 in words is "two hundred twenty-one million, two hundred fifty-five thousand, five hundred sixty-three".