216072569 has 2 divisors, whose sum is σ = 216072570. Its totient is φ = 216072568.

The previous prime is 216072539. The next prime is 216072587. The reversal of 216072569 is 965270612.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210250000 + 5822569 = 14500^2 + 2413^2 .

It is a cyclic number.

It is not a de Polignac number, because 216072569 - 2²⁰ = 215023993 is a prime.

It is a super-2 number, since 2×216072569² = 93374710148519522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (216072529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108036284 + 108036285.

It is an arithmetic number, because the mean of its divisors is an integer number (108036285).

Almost surely, 2^216072569 is an apocalyptic number.

It is an amenable number.

216072569 is a deficient number, since it is larger than the sum of its proper divisors (1).

216072569 is an equidigital number, since it uses as much as digits as its factorization.

216072569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 216072569 is about 14699.4070968866. The cubic root of 216072569 is about 600.0671859950.

The spelling of 216072569 in words is "two hundred sixteen million, seventy-two thousand, five hundred sixty-nine".