221980442 has 8 divisors (see below), whose sum is σ = 344452500. Its totient is φ = 107162944.

The previous prime is 221980399. The next prime is 221980453. The reversal of 221980442 is 244089122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 216648961 + 5331481 = 14719^2 + 2309^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221980399 and 221980408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1913567 + ... + 1913682.

Almost surely, 2^221980442 is an apocalyptic number.

221980442 is a deficient number, since it is larger than the sum of its proper divisors (122472058).

221980442 is a wasteful number, since it uses less digits than its factorization.

221980442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3827280.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 221980442 is about 14899.0080877889. The cubic root of 221980442 is about 605.4871126503.

The spelling of 221980442 in words is "two hundred twenty-one million, nine hundred eighty thousand, four hundred forty-two".