217134445 has 8 divisors (see below), whose sum is σ = 284248800. Its totient is φ = 157915920.

The previous prime is 217134443. The next prime is 217134469. The reversal of 217134445 is 544431712.

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

It is not a de Polignac number, because 217134445 - 2¹ = 217134443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217134443) 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, 1973895 + ... + 1974004.

It is an arithmetic number, because the mean of its divisors is an integer number (35531100).

Almost surely, 2^217134445 is an apocalyptic number.

It is an amenable number.

217134445 is a deficient number, since it is larger than the sum of its proper divisors (67114355).

217134445 is a wasteful number, since it uses less digits than its factorization.

217134445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3947915.

The product of its digits is 13440, while the sum is 31.

The square root of 217134445 is about 14735.4825167010. The cubic root of 217134445 is about 601.0485784416.

The spelling of 217134445 in words is "two hundred seventeen million, one hundred thirty-four thousand, four hundred forty-five".