221674441 has 4 divisors (see below), whose sum is σ = 234714132. Its totient is φ = 208634752.

The previous prime is 221674433. The next prime is 221674487. The reversal of 221674441 is 144476122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 153859216 + 67815225 = 12404^2 + 8235^2 .

It is a cyclic number.

It is not a de Polignac number, because 221674441 - 2³ = 221674433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221674421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6519820 + ... + 6519853.

It is an arithmetic number, because the mean of its divisors is an integer number (58678533).

Almost surely, 2^221674441 is an apocalyptic number.

It is an amenable number.

221674441 is a deficient number, since it is larger than the sum of its proper divisors (13039691).

221674441 is a wasteful number, since it uses less digits than its factorization.

221674441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13039690.

The product of its digits is 10752, while the sum is 31.

The square root of 221674441 is about 14888.7353727575. The cubic root of 221674441 is about 605.2087625071.

The spelling of 221674441 in words is "two hundred twenty-one million, six hundred seventy-four thousand, four hundred forty-one".