221199768 has 32 divisors (see below), whose sum is σ = 614444400. Its totient is φ = 73733184.

The previous prime is 221199751. The next prime is 221199773. The reversal of 221199768 is 867991122.

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, 511821 + ... + 512252.

Almost surely, 2^221199768 is an apocalyptic number.

It is an amenable number.

221199768 is an abundant number, since it is smaller than the sum of its proper divisors (393244632).

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

221199768 is a wasteful number, since it uses less digits than its factorization.

221199768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024088 (or 1024078 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 221199768 is about 14872.7861545845. The cubic root of 221199768 is about 604.7764745825.

The spelling of 221199768 in words is "two hundred twenty-one million, one hundred ninety-nine thousand, seven hundred sixty-eight".