221124418 has 8 divisors (see below), whose sum is σ = 332426700. Its totient is φ = 110315520.

The previous prime is 221124403. The next prime is 221124419. The reversal of 221124418 is 814421122.

It can be written as a sum of positive squares in 2 ways, for example, as 184606569 + 36517849 = 13587^2 + 6043^2 .

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 = 221124392 and 221124401.

It is not an unprimeable number, because it can be changed into a prime (221124419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122223 + ... + 124018.

Almost surely, 2^221124418 is an apocalyptic number.

221124418 is a deficient number, since it is larger than the sum of its proper divisors (111302282).

221124418 is a wasteful number, since it uses less digits than its factorization.

221124418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246692.

The product of its digits is 1024, while the sum is 25.

The square root of 221124418 is about 14870.2527887054. The cubic root of 221124418 is about 604.7077959652.

The spelling of 221124418 in words is "two hundred twenty-one million, one hundred twenty-four thousand, four hundred eighteen".