216525341 has 4 divisors (see below), whose sum is σ = 218958300. Its totient is φ = 214092384.

The previous prime is 216525317. The next prime is 216525347. The reversal of 216525341 is 143525612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77968900 + 138556441 = 8830^2 + 11771^2 .

It is a cyclic number.

It is not a de Polignac number, because 216525341 - 2¹⁸ = 216263197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216525347) 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 3 ways as a sum of consecutive naturals, for example, 1216346 + ... + 1216523.

It is an arithmetic number, because the mean of its divisors is an integer number (54739575).

Almost surely, 2^216525341 is an apocalyptic number.

It is an amenable number.

216525341 is a deficient number, since it is larger than the sum of its proper divisors (2432959).

216525341 is an equidigital number, since it uses as much as digits as its factorization.

216525341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432958.

The product of its digits is 7200, while the sum is 29.

The square root of 216525341 is about 14714.8000665996. The cubic root of 216525341 is about 600.4860330320.

The spelling of 216525341 in words is "two hundred sixteen million, five hundred twenty-five thousand, three hundred forty-one".