216379569 has 16 divisors (see below), whose sum is σ = 337390592. Its totient is φ = 120769488.

The previous prime is 216379567. The next prime is 216379571. The reversal of 216379569 is 965973612.

216379569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (216379567) and next prime (216379571).

It is not a de Polignac number, because 216379569 - 2¹ = 216379567 is a prime.

It is a super-2 number, since 2×216379569² = 93640235761251522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216379567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118909 + ... + 120714.

It is an arithmetic number, because the mean of its divisors is an integer number (21086912).

Almost surely, 2^216379569 is an apocalyptic number.

It is an amenable number.

216379569 is a deficient number, since it is larger than the sum of its proper divisors (121011023).

216379569 is a wasteful number, since it uses less digits than its factorization.

216379569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239676.

The product of its digits is 612360, while the sum is 48.

The square root of 216379569 is about 14709.8459883168. The cubic root of 216379569 is about 600.3512471134.

The spelling of 216379569 in words is "two hundred sixteen million, three hundred seventy-nine thousand, five hundred sixty-nine".