216380569 has 4 divisors (see below), whose sum is σ = 227769040. Its totient is φ = 204992100.

The previous prime is 216380561. The next prime is 216380579. The reversal of 216380569 is 965083612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216380569 - 2³ = 216380561 is a prime.

It is a super-2 number, since 2×216380569² = 93641101281527522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216380561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5694207 + ... + 5694244.

It is an arithmetic number, because the mean of its divisors is an integer number (56942260).

Almost surely, 2^216380569 is an apocalyptic number.

It is an amenable number.

216380569 is a deficient number, since it is larger than the sum of its proper divisors (11388471).

216380569 is a wasteful number, since it uses less digits than its factorization.

216380569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11388470.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 216380569 is about 14709.8799791161. The cubic root of 216380569 is about 600.3521719548.

The spelling of 216380569 in words is "two hundred sixteen million, three hundred eighty thousand, five hundred sixty-nine".