217325045 has 24 divisors (see below), whose sum is σ = 316566144. Its totient is φ = 142539936.

The previous prime is 217325029. The next prime is 217325047. The reversal of 217325045 is 540523712.

It is a happy number.

It is not a de Polignac number, because 217325045 - 2⁴ = 217325029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 217324999 and 217325017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217325047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13649 + ... + 24918.

It is an arithmetic number, because the mean of its divisors is an integer number (13190256).

Almost surely, 2^217325045 is an apocalyptic number.

It is an amenable number.

217325045 is a deficient number, since it is larger than the sum of its proper divisors (99241099).

217325045 is a wasteful number, since it uses less digits than its factorization.

217325045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38609 (or 38602 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 217325045 is about 14741.9484804418. The cubic root of 217325045 is about 601.2243932542.

Adding to 217325045 its reverse (540523712), we get a palindrome (757848757).

The spelling of 217325045 in words is "two hundred seventeen million, three hundred twenty-five thousand, forty-five".