221383641 has 8 divisors (see below), whose sum is σ = 302377824. Its totient is φ = 143989280.

The previous prime is 221383637. The next prime is 221383697. The reversal of 221383641 is 146383122.

221383641 is digitally balanced in base 2, 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 cyclic number.

It is not a de Polignac number, because 221383641 - 2² = 221383637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221383599 and 221383608.

It is not an unprimeable number, because it can be changed into a prime (221383601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 899811 + ... + 900056.

It is an arithmetic number, because the mean of its divisors is an integer number (37797228).

Almost surely, 2^221383641 is an apocalyptic number.

It is an amenable number.

221383641 is a deficient number, since it is larger than the sum of its proper divisors (80994183).

221383641 is a wasteful number, since it uses less digits than its factorization.

221383641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799911.

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

The square root of 221383641 is about 14878.9663955532. The cubic root of 221383641 is about 604.9440022847.

The spelling of 221383641 in words is "two hundred twenty-one million, three hundred eighty-three thousand, six hundred forty-one".