216169243 has 2 divisors, whose sum is σ = 216169244. Its totient is φ = 216169242.

The previous prime is 216169199. The next prime is 216169271. The reversal of 216169243 is 342961612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216169243 - 2¹³ = 216161051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216169199 and 216169208.

It is not a weakly prime, because it can be changed into another prime (216169273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108084621 + 108084622.

It is an arithmetic number, because the mean of its divisors is an integer number (108084622).

Almost surely, 2^216169243 is an apocalyptic number.

216169243 is a deficient number, since it is larger than the sum of its proper divisors (1).

216169243 is an equidigital number, since it uses as much as digits as its factorization.

216169243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 34.

The square root of 216169243 is about 14702.6950930773. The cubic root of 216169243 is about 600.1566655711.

The spelling of 216169243 in words is "two hundred sixteen million, one hundred sixty-nine thousand, two hundred forty-three".