988221 has 8 divisors (see below), whose sum is σ = 1419040. Its totient is φ = 608112.

The previous prime is 988219. The next prime is 988231. The reversal of 988221 is 122889.

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

It is not a de Polignac number, because 988221 - 2¹ = 988219 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12631 + ... + 12708.

It is an arithmetic number, because the mean of its divisors is an integer number (177380).

2⁹⁸⁸²²¹ is an apocalyptic number.

It is an amenable number.

988221 is a deficient number, since it is larger than the sum of its proper divisors (430819).

988221 is a wasteful number, since it uses less digits than its factorization.

988221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25355.

The product of its digits is 2304, while the sum is 30.

The square root of 988221 is about 994.0930539944. The cubic root of 988221 is about 99.6058148893.

The spelling of 988221 in words is "nine hundred eighty-eight thousand, two hundred twenty-one".