221243196 has 24 divisors (see below), whose sum is σ = 517775440. Its totient is φ = 73527552.

The previous prime is 221243177. The next prime is 221243207. The reversal of 221243196 is 691342122.

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, 23311 + ... + 31398.

Almost surely, 2^221243196 is an apocalyptic number.

It is an amenable number.

221243196 is an abundant number, since it is smaller than the sum of its proper divisors (296532244).

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

221243196 is a wasteful number, since it uses less digits than its factorization.

221243196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55053 (or 55051 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 221243196 is about 14874.2460649271. The cubic root of 221243196 is about 604.8160504440.

The spelling of 221243196 in words is "two hundred twenty-one million, two hundred forty-three thousand, one hundred ninety-six".