217325255 has 16 divisors (see below), whose sum is σ = 298712064. Its totient is φ = 148690080.

The previous prime is 217325237. The next prime is 217325279. The reversal of 217325255 is 552523712.

It is not a de Polignac number, because 217325255 - 2¹⁶ = 217259719 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9500 + ... + 22910.

It is an arithmetic number, because the mean of its divisors is an integer number (18669504).

Almost surely, 2^217325255 is an apocalyptic number.

217325255 is a deficient number, since it is larger than the sum of its proper divisors (81386809).

217325255 is a wasteful number, since it uses less digits than its factorization.

217325255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13886.

The product of its digits is 21000, while the sum is 32.

The square root of 217325255 is about 14741.9556029721. The cubic root of 217325255 is about 601.2245869074.

Adding to 217325255 its reverse (552523712), we get a palindrome (769848967).

The spelling of 217325255 in words is "two hundred seventeen million, three hundred twenty-five thousand, two hundred fifty-five".