221884001 has 8 divisors (see below), whose sum is σ = 224075808. Its totient is φ = 219700000.

The previous prime is 221883989. The next prime is 221884007. The reversal of 221884001 is 100488122.

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

It is a 3-Lehmer number, since φ(221884001) divides (221884001-1)³.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 221884001 - 2¹⁰ = 221882977 is a prime.

It is a deceptive number, since it divides R_221884000.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221884007) 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, 66626 + ... + 69876.

It is an arithmetic number, because the mean of its divisors is an integer number (28009476).

It is a Poulet number, since it divides 2^221884000-1.

Almost surely, 2^221884001 is an apocalyptic number.

It is an amenable number.

221884001 is a deficient number, since it is larger than the sum of its proper divisors (2191807).

221884001 is a wasteful number, since it uses less digits than its factorization.

221884001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3903.

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 221884001 is about 14895.7712455583. The cubic root of 221884001 is about 605.3994138713.

The spelling of 221884001 in words is "two hundred twenty-one million, eight hundred eighty-four thousand, one".