216185379 has 8 divisors (see below), whose sum is σ = 305202960. Its totient is φ = 135645696.

The previous prime is 216185377. The next prime is 216185393. The reversal of 216185379 is 973581612.

216185379 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216185379 - 2¹ = 216185377 is a prime.

It is a super-2 number, since 2×216185379² = 93472236186747282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216185379.

It is not an unprimeable number, because it can be changed into a prime (216185371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2119414 + ... + 2119515.

It is an arithmetic number, because the mean of its divisors is an integer number (38150370).

Almost surely, 2^216185379 is an apocalyptic number.

216185379 is a deficient number, since it is larger than the sum of its proper divisors (89017581).

216185379 is a wasteful number, since it uses less digits than its factorization.

216185379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238949.

The product of its digits is 90720, while the sum is 42.

The square root of 216185379 is about 14703.2438257685. The cubic root of 216185379 is about 600.1715981410.

The spelling of 216185379 in words is "two hundred sixteen million, one hundred eighty-five thousand, three hundred seventy-nine".