217948 has 18 divisors (see below), whose sum is σ = 402584. Its totient is φ = 103224.

The previous prime is 217937. The next prime is 217969. The reversal of 217948 is 849712.

217948 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2065 + ... + 2167.

2²¹⁷⁹⁴⁸ is an apocalyptic number.

It is an amenable number.

217948 is a deficient number, since it is larger than the sum of its proper divisors (184636).

217948 is a wasteful number, since it uses less digits than its factorization.

217948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 128 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 217948 is about 466.8490119942. The cubic root of 217948 is about 60.1798308463.

The spelling of 217948 in words is "two hundred seventeen thousand, nine hundred forty-eight".