217029 has 8 divisors (see below), whose sum is σ = 293632. Its totient is φ = 142560.

The previous prime is 217027. The next prime is 217033. The reversal of 217029 is 920712.

It is a happy number.

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

It is not a de Polignac number, because 217029 - 2¹ = 217027 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 216996 and 217014.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 217029.

It is not an unprimeable number, because it can be changed into a prime (217027) 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, 277 + ... + 714.

It is an arithmetic number, because the mean of its divisors is an integer number (36704).

2²¹⁷⁰²⁹ is an apocalyptic number.

It is an amenable number.

217029 is a deficient number, since it is larger than the sum of its proper divisors (76603).

217029 is an equidigital number, since it uses as much as digits as its factorization.

217029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 217029 is about 465.8637139765. The cubic root of 217029 is about 60.0951268794.

The spelling of 217029 in words is "two hundred seventeen thousand, twenty-nine".