221662416 has 20 divisors (see below), whose sum is σ = 572628032. Its totient is φ = 73887456.

The previous prime is 221662403. The next prime is 221662423. The reversal of 221662416 is 614266122.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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, 2308936 + ... + 2309031.

Almost surely, 2^221662416 is an apocalyptic number.

It is an amenable number.

221662416 is an abundant number, since it is smaller than the sum of its proper divisors (350965616).

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

221662416 is a wasteful number, since it uses less digits than its factorization.

221662416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4617978 (or 4617972 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 221662416 is about 14888.3315384901. The cubic root of 221662416 is about 605.1978188804.

The spelling of 221662416 in words is "two hundred twenty-one million, six hundred sixty-two thousand, four hundred sixteen".