221088392 has 36 divisors (see below), whose sum is σ = 482863815. Its totient is φ = 94626000.

The previous prime is 221088377. The next prime is 221088407. The reversal of 221088392 is 293880122.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is an interprime number because it is at equal distance from previous prime (221088377) and next prime (221088407).

It can be written as a sum of positive squares in only one way, i.e., 110544196 + 110544196 = 10514^2 + 10514^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=10514.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 294017 + ... + 294767.

Almost surely, 2^221088392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221088392

221088392 is an abundant number, since it is smaller than the sum of its proper divisors (261775423).

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

221088392 is an frugal number, since it uses more digits than its factorization.

221088392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522 (or 760 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 221088392 is about 14869.0413947907. The cubic root of 221088392 is about 604.6749541433.

The spelling of 221088392 in words is "two hundred twenty-one million, eighty-eight thousand, three hundred ninety-two".