217425 has 24 divisors (see below), whose sum is σ = 388864. Its totient is φ = 106560.

The previous prime is 217421. The next prime is 217429. The reversal of 217425 is 524712.

It is an interprime number because it is at equal distance from previous prime (217421) and next prime (217429).

It is not a de Polignac number, because 217425 - 2² = 217421 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 217425.

It is not an unprimeable number, because it can be changed into a prime (217421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 864 + ... + 1086.

2²¹⁷⁴²⁵ is an apocalyptic number.

217425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

217425 is a deficient number, since it is larger than the sum of its proper divisors (171439).

217425 is a wasteful number, since it uses less digits than its factorization.

217425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 244 counting only the distinct ones).

The product of its digits is 560, while the sum is 21.

The square root of 217425 is about 466.2885372814. The cubic root of 217425 is about 60.1316553476.

The spelling of 217425 in words is "two hundred seventeen thousand, four hundred twenty-five".