207216045 has 12 divisors (see below), whose sum is σ = 359174556. Its totient is φ = 110515200.

The previous prime is 207216017. The next prime is 207216067. The reversal of 207216045 is 540612702.

It can be written as a sum of positive squares in 2 ways, for example, as 111450249 + 95765796 = 10557^2 + 9786^2 .

It is a de Polignac number, because none of the positive numbers 2^k-207216045 is a prime.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2302356 + ... + 2302445.

It is an arithmetic number, because the mean of its divisors is an integer number (29931213).

Almost surely, 2^207216045 is an apocalyptic number.

It is an amenable number.

207216045 is a deficient number, since it is larger than the sum of its proper divisors (151958511).

207216045 is a wasteful number, since it uses less digits than its factorization.

207216045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4604812 (or 4604809 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 207216045 is about 14395.0006946856. Note that the first 3 decimals coincide. The cubic root of 207216045 is about 591.7538971655.

Adding to 207216045 its reverse (540612702), we get a palindrome (747828747).

The spelling of 207216045 in words is "two hundred seven million, two hundred sixteen thousand, forty-five".