221144188 has 6 divisors (see below), whose sum is σ = 387002336. Its totient is φ = 110572092.

The previous prime is 221144159. The next prime is 221144207. The reversal of 221144188 is 881441122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27643020 + ... + 27643027.

Almost surely, 2^221144188 is an apocalyptic number.

It is an amenable number.

221144188 is a deficient number, since it is larger than the sum of its proper divisors (165858148).

221144188 is a wasteful number, since it uses less digits than its factorization.

221144188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55286051 (or 55286049 counting only the distinct ones).

The product of its digits is 4096, while the sum is 31.

The square root of 221144188 is about 14870.9175238114. The cubic root of 221144188 is about 604.7258170668.

The spelling of 221144188 in words is "two hundred twenty-one million, one hundred forty-four thousand, one hundred eighty-eight".