221598030564 has 81 divisors (see below), whose sum is σ = 569121829731. Its totient is φ = 72701394480.

The previous prime is 221598030509. The next prime is 221598030581. The reversal of 221598030564 is 465030895122.

The square root of 221598030564 is 470742.

It is a perfect power (a square), and thus also a powerful number.

221598030564 is a `hidden beast` number, since 2 + 2 + 1 + 5 + 9 + 80 + 3 + 0 + 564 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 189237699 + ... + 189238869.

Almost surely, 2^221598030564 is an apocalyptic number.

221598030564 is the 470742-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221598030564

221598030564 is an abundant number, since it is smaller than the sum of its proper divisors (347523799167).

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

221598030564 is an equidigital number, since it uses as much as digits as its factorization.

221598030564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2486 (or 1243 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 221598030564 in words is "two hundred twenty-one billion, five hundred ninety-eight million, thirty thousand, five hundred sixty-four".