217225093 has 4 divisors (see below), whose sum is σ = 222523308. Its totient is φ = 211926880.

The previous prime is 217225067. The next prime is 217225147. The reversal of 217225093 is 390522712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25070049 + 192155044 = 5007^2 + 13862^2 .

It is a cyclic number.

It is not a de Polignac number, because 217225093 - 2⁵ = 217225061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217225033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2649046 + ... + 2649127.

It is an arithmetic number, because the mean of its divisors is an integer number (55630827).

Almost surely, 2^217225093 is an apocalyptic number.

It is an amenable number.

217225093 is a deficient number, since it is larger than the sum of its proper divisors (5298215).

217225093 is an equidigital number, since it uses as much as digits as its factorization.

217225093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5298214.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 217225093 is about 14738.5580366602. The cubic root of 217225093 is about 601.1322075367.

The spelling of 217225093 in words is "two hundred seventeen million, two hundred twenty-five thousand, ninety-three".