217049 has 8 divisors (see below), whose sum is σ = 251328. Its totient is φ = 183600.

The previous prime is 217033. The next prime is 217057. The reversal of 217049 is 940712.

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 217049 - 2⁴ = 217033 is a prime.

It is a super-2 number, since 2×217049² = 94220536802, which contains 22 as substring.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (217069) 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, 554 + ... + 860.

It is an arithmetic number, because the mean of its divisors is an integer number (31416).

2²¹⁷⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

217049 is a deficient number, since it is larger than the sum of its proper divisors (34279).

217049 is a wasteful number, since it uses less digits than its factorization.

217049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 217049 is about 465.8851789873. The cubic root of 217049 is about 60.0969728164.

The spelling of 217049 in words is "two hundred seventeen thousand, forty-nine".