217094147 has 8 divisors (see below), whose sum is σ = 226319232. Its totient is φ = 208008000.

The previous prime is 217094113. The next prime is 217094149. The reversal of 217094147 is 741490712.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-217094147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217094149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31538 + ... + 37799.

It is an arithmetic number, because the mean of its divisors is an integer number (28289904).

Almost surely, 2^217094147 is an apocalyptic number.

217094147 is a deficient number, since it is larger than the sum of its proper divisors (9225085).

217094147 is a wasteful number, since it uses less digits than its factorization.

217094147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69469.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 217094147 is about 14734.1150735292. The cubic root of 217094147 is about 601.0113932556.

The spelling of 217094147 in words is "two hundred seventeen million, ninety-four thousand, one hundred forty-seven".