221006985 has 8 divisors (see below), whose sum is σ = 353611200. Its totient is φ = 117870384.

The previous prime is 221006969. The next prime is 221007001. The reversal of 221006985 is 589600122.

It is an interprime number because it is at equal distance from previous prime (221006969) and next prime (221007001).

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

It is not a de Polignac number, because 221006985 - 2⁴ = 221006969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7366885 + ... + 7366914.

It is an arithmetic number, because the mean of its divisors is an integer number (44201400).

Almost surely, 2^221006985 is an apocalyptic number.

It is an amenable number.

221006985 is a deficient number, since it is larger than the sum of its proper divisors (132604215).

221006985 is a wasteful number, since it uses less digits than its factorization.

221006985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14733807.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 221006985 is about 14866.3036764355. The cubic root of 221006985 is about 604.6007292047.

The spelling of 221006985 in words is "two hundred twenty-one million, six thousand, nine hundred eighty-five".