221675864 has 32 divisors (see below), whose sum is σ = 420839280. Its totient is φ = 109461504.

The previous prime is 221675849. The next prime is 221675887. The reversal of 221675864 is 468576122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281279 + ... + 282065.

Almost surely, 2^221675864 is an apocalyptic number.

It is an amenable number.

221675864 is a deficient number, since it is larger than the sum of its proper divisors (199163416).

221675864 is a wasteful number, since it uses less digits than its factorization.

221675864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187 (or 1183 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 221675864 is about 14888.7831604870. The cubic root of 221675864 is about 605.2100575146.

The spelling of 221675864 in words is "two hundred twenty-one million, six hundred seventy-five thousand, eight hundred sixty-four".