221498368 has 88 divisors (see below), whose sum is σ = 545189792. Its totient is φ = 87588864.

The previous prime is 221498339. The next prime is 221498369. The reversal of 221498368 is 863894122.

It is not an unprimeable number, because it can be changed into a prime (221498369) 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 in 7 ways as a sum of consecutive naturals, for example, 91996 + ... + 94372.

Almost surely, 2^221498368 is an apocalyptic number.

221498368 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221498368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272594896).

221498368 is an abundant number, since it is smaller than the sum of its proper divisors (323691424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221498368 is a wasteful number, since it uses less digits than its factorization.

221498368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417 (or 2399 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 221498368 is about 14882.8212379239. The cubic root of 221498368 is about 605.0484836950.

The spelling of 221498368 in words is "two hundred twenty-one million, four hundred ninety-eight thousand, three hundred sixty-eight".