221780896 has 12 divisors (see below), whose sum is σ = 436631202. Its totient is φ = 110890432.

The previous prime is 221780879. The next prime is 221780903. The reversal of 221780896 is 698087122.

It can be written as a sum of positive squares in only one way, i.e., 134096400 + 87684496 = 11580^2 + 9364^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3465295 + ... + 3465358.

Almost surely, 2^221780896 is an apocalyptic number.

It is an amenable number.

221780896 is a deficient number, since it is larger than the sum of its proper divisors (214850306).

221780896 is an equidigital number, since it uses as much as digits as its factorization.

221780896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6930663 (or 6930655 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 221780896 is about 14892.3099618562. The cubic root of 221780896 is about 605.3056270620.

The spelling of 221780896 in words is "two hundred twenty-one million, seven hundred eighty thousand, eight hundred ninety-six".