216525061 has 2 divisors, whose sum is σ = 216525062. Its totient is φ = 216525060.

The previous prime is 216525031. The next prime is 216525077. The reversal of 216525061 is 160525612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208224900 + 8300161 = 14430^2 + 2881^2 .

It is a cyclic number.

It is not a de Polignac number, because 216525061 - 2⁹ = 216524549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216525011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108262530 + 108262531.

It is an arithmetic number, because the mean of its divisors is an integer number (108262531).

Almost surely, 2^216525061 is an apocalyptic number.

It is an amenable number.

216525061 is a deficient number, since it is larger than the sum of its proper divisors (1).

216525061 is an equidigital number, since it uses as much as digits as its factorization.

216525061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 216525061 is about 14714.7905523660. The cubic root of 216525061 is about 600.4857741922.

The spelling of 216525061 in words is "two hundred sixteen million, five hundred twenty-five thousand, sixty-one".