221348455 has 8 divisors (see below), whose sum is σ = 265734000. Its totient is φ = 177001536.

The previous prime is 221348437. The next prime is 221348459. The reversal of 221348455 is 554843122.

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 221348455 - 2⁹ = 221347943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221348455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221348459) 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, 4971 + ... + 21619.

It is an arithmetic number, because the mean of its divisors is an integer number (33216750).

Almost surely, 2^221348455 is an apocalyptic number.

221348455 is a deficient number, since it is larger than the sum of its proper divisors (44385545).

221348455 is a wasteful number, since it uses less digits than its factorization.

221348455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19313.

The product of its digits is 38400, while the sum is 34.

The square root of 221348455 is about 14877.7839411654. The cubic root of 221348455 is about 604.9119513055.

The spelling of 221348455 in words is "two hundred twenty-one million, three hundred forty-eight thousand, four hundred fifty-five".