221000973 has 8 divisors (see below), whose sum is σ = 297979200. Its totient is φ = 145678368.

The previous prime is 221000971. The next prime is 221000981. The reversal of 221000973 is 379000122.

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

It is not a de Polignac number, because 221000973 - 2¹ = 221000971 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413593 + ... + 414126.

It is an arithmetic number, because the mean of its divisors is an integer number (37247400).

Almost surely, 2^221000973 is an apocalyptic number.

It is an amenable number.

221000973 is a deficient number, since it is larger than the sum of its proper divisors (76978227).

221000973 is an equidigital number, since it uses as much as digits as its factorization.

221000973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827811.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 221000973 is about 14866.1014728139. The cubic root of 221000973 is about 604.5952468855.

The spelling of 221000973 in words is "two hundred twenty-one million, nine hundred seventy-three", and thus it is an aban number.