217151193 has 12 divisors (see below), whose sum is σ = 336806160. Its totient is φ = 124086312.

The previous prime is 217151173. The next prime is 217151197. The reversal of 217151193 is 391151712.

It is not a de Polignac number, because 217151193 - 2²⁰ = 216102617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 217151193.

It is not an unprimeable number, because it can be changed into a prime (217151197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 738463 + ... + 738756.

It is an arithmetic number, because the mean of its divisors is an integer number (28067180).

Almost surely, 2^217151193 is an apocalyptic number.

It is an amenable number.

217151193 is a deficient number, since it is larger than the sum of its proper divisors (119654967).

217151193 is a wasteful number, since it uses less digits than its factorization.

217151193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477236 (or 1477229 counting only the distinct ones).

The product of its digits is 1890, while the sum is 30.

The square root of 217151193 is about 14736.0507938864. The cubic root of 217151193 is about 601.0640313910.

The spelling of 217151193 in words is "two hundred seventeen million, one hundred fifty-one thousand, one hundred ninety-three".