217230971 has 8 divisors (see below), whose sum is σ = 228802320. Its totient is φ = 205673472.

The previous prime is 217230953. The next prime is 217230973. The reversal of 217230971 is 179032712.

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 217230971 - 2¹⁴ = 217214587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217230973) 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, 50231 + ... + 54383.

It is an arithmetic number, because the mean of its divisors is an integer number (28600290).

Almost surely, 2^217230971 is an apocalyptic number.

217230971 is a deficient number, since it is larger than the sum of its proper divisors (11571349).

217230971 is a wasteful number, since it uses less digits than its factorization.

217230971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6925.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 217230971 is about 14738.7574442353. The cubic root of 217230971 is about 601.1376295979.

The spelling of 217230971 in words is "two hundred seventeen million, two hundred thirty thousand, nine hundred seventy-one".