216148529 has 2 divisors, whose sum is σ = 216148530. Its totient is φ = 216148528.

The previous prime is 216148507. The next prime is 216148643. The reversal of 216148529 is 925841612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185368225 + 30780304 = 13615^2 + 5548^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216148529 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 216148492 and 216148501.

It is not a weakly prime, because it can be changed into another prime (216148129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108074264 + 108074265.

It is an arithmetic number, because the mean of its divisors is an integer number (108074265).

Almost surely, 2^216148529 is an apocalyptic number.

It is an amenable number.

216148529 is a deficient number, since it is larger than the sum of its proper divisors (1).

216148529 is an equidigital number, since it uses as much as digits as its factorization.

216148529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The square root of 216148529 is about 14701.9906475280. The cubic root of 216148529 is about 600.1374953412.

The spelling of 216148529 in words is "two hundred sixteen million, one hundred forty-eight thousand, five hundred twenty-nine".