221545414 has 8 divisors (see below), whose sum is σ = 333582480. Its totient is φ = 110351256.

The previous prime is 221545403. The next prime is 221545433. The reversal of 221545414 is 414545122.

221545414 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

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, 210069 + ... + 211120.

It is an arithmetic number, because the mean of its divisors is an integer number (41697810).

Almost surely, 2^221545414 is an apocalyptic number.

221545414 is a deficient number, since it is larger than the sum of its proper divisors (112037066).

221545414 is a wasteful number, since it uses less digits than its factorization.

221545414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421454.

The product of its digits is 6400, while the sum is 28.

The square root of 221545414 is about 14884.4017011098. The cubic root of 221545414 is about 605.0913178645.

The spelling of 221545414 in words is "two hundred twenty-one million, five hundred forty-five thousand, four hundred fourteen".