216525073 has 8 divisors (see below), whose sum is σ = 235458792. Its totient is φ = 198279936.

The previous prime is 216525061. The next prime is 216525077. The reversal of 216525073 is 370525612.

It can be written as a sum of positive squares in 4 ways, for example, as 173923344 + 42601729 = 13188^2 + 6527^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216525073 - 2¹⁷ = 216394001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216525077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171490 + ... + 172747.

It is an arithmetic number, because the mean of its divisors is an integer number (29432349).

Almost surely, 2^216525073 is an apocalyptic number.

It is an amenable number.

216525073 is a deficient number, since it is larger than the sum of its proper divisors (18933719).

216525073 is a wasteful number, since it uses less digits than its factorization.

216525073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344291.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 216525073 is about 14714.7909601190. The cubic root of 216525073 is about 600.4857852853.

The spelling of 216525073 in words is "two hundred sixteen million, five hundred twenty-five thousand, seventy-three".