217481223 has 8 divisors (see below), whose sum is σ = 291895936. Its totient is φ = 144027000.

The previous prime is 217481219. The next prime is 217481249. The reversal of 217481223 is 322184712.

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

It is not a de Polignac number, because 217481223 - 2² = 217481219 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 (217481293) 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, 239593 + ... + 240498.

It is an arithmetic number, because the mean of its divisors is an integer number (36486992).

Almost surely, 2^217481223 is an apocalyptic number.

217481223 is a deficient number, since it is larger than the sum of its proper divisors (74414713).

217481223 is a wasteful number, since it uses less digits than its factorization.

217481223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480245.

The product of its digits is 5376, while the sum is 30.

The square root of 217481223 is about 14747.2445900921. The cubic root of 217481223 is about 601.3683796340.

The spelling of 217481223 in words is "two hundred seventeen million, four hundred eighty-one thousand, two hundred twenty-three".