221332985 has 8 divisors (see below), whose sum is σ = 265680000. Its totient is φ = 177012784.

The previous prime is 221332981. The next prime is 221332999. The reversal of 221332985 is 589233122.

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 221332985 - 2² = 221332981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221332981) 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, 25766 + ... + 33264.

It is an arithmetic number, because the mean of its divisors is an integer number (33210000).

Almost surely, 2^221332985 is an apocalyptic number.

It is an amenable number.

221332985 is a deficient number, since it is larger than the sum of its proper divisors (44347015).

221332985 is an equidigital number, since it uses as much as digits as its factorization.

221332985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13407.

The product of its digits is 25920, while the sum is 35.

The square root of 221332985 is about 14877.2640293839. The cubic root of 221332985 is about 604.8978585847.

The spelling of 221332985 in words is "two hundred twenty-one million, three hundred thirty-two thousand, nine hundred eighty-five".