221087201 has 8 divisors (see below), whose sum is σ = 235609344. Its totient is φ = 206974240.

The previous prime is 221087197. The next prime is 221087239. The reversal of 221087201 is 102780122.

221087201 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 not a de Polignac number, because 221087201 - 2² = 221087197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221087281) 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, 101180 + ... + 103341.

It is an arithmetic number, because the mean of its divisors is an integer number (29451168).

Almost surely, 2^221087201 is an apocalyptic number.

It is an amenable number.

221087201 is a deficient number, since it is larger than the sum of its proper divisors (14522143).

221087201 is a wasteful number, since it uses less digits than its factorization.

221087201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204591.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 221087201 is about 14869.0013450803. The cubic root of 221087201 is about 604.6738683495.

The spelling of 221087201 in words is "two hundred twenty-one million, eighty-seven thousand, two hundred one".