221030984 has 8 divisors (see below), whose sum is σ = 414433110. Its totient is φ = 110515488.

The previous prime is 221030983. The next prime is 221030987. The reversal of 221030984 is 489030122.

It can be written as a sum of positive squares in only one way, i.e., 119464900 + 101566084 = 10930^2 + 10078^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (221030983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13814429 + ... + 13814444.

Almost surely, 2^221030984 is an apocalyptic number.

It is an amenable number.

221030984 is a deficient number, since it is larger than the sum of its proper divisors (193402126).

221030984 is a wasteful number, since it uses less digits than its factorization.

221030984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27628879 (or 27628875 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 221030984 is about 14867.1108154880. The cubic root of 221030984 is about 604.6226128083.

The spelling of 221030984 in words is "two hundred twenty-one million, thirty thousand, nine hundred eighty-four".