216525315 has 32 divisors (see below), whose sum is σ = 352864512. Its totient is φ = 113360000.

The previous prime is 216525293. The next prime is 216525317. The reversal of 216525315 is 513525612.

It is a happy number.

It is not a de Polignac number, because 216525315 - 2⁶ = 216525251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216525317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197920 + ... + 199010.

It is an arithmetic number, because the mean of its divisors is an integer number (11027016).

Almost surely, 2^216525315 is an apocalyptic number.

216525315 is a deficient number, since it is larger than the sum of its proper divisors (136339197).

216525315 is a wasteful number, since it uses less digits than its factorization.

216525315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331.

The product of its digits is 9000, while the sum is 30.

The square root of 216525315 is about 14714.7991831353. The cubic root of 216525315 is about 600.4860089969.

The spelling of 216525315 in words is "two hundred sixteen million, five hundred twenty-five thousand, three hundred fifteen".