216348386 has 8 divisors (see below), whose sum is σ = 324727644. Its totient is φ = 108105840.

The previous prime is 216348371. The next prime is 216348401. The reversal of 216348386 is 683843612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (216348371) and next prime (216348401).

It can be written as a sum of positive squares in 2 ways, for example, as 169494361 + 46854025 = 13019^2 + 6845^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30125 + ... + 36608.

Almost surely, 2^216348386 is an apocalyptic number.

216348386 is a deficient number, since it is larger than the sum of its proper divisors (108379258).

216348386 is a wasteful number, since it uses less digits than its factorization.

216348386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68356.

The product of its digits is 165888, while the sum is 41.

The square root of 216348386 is about 14708.7860138082. The cubic root of 216348386 is about 600.3224063555.

The spelling of 216348386 in words is "two hundred sixteen million, three hundred forty-eight thousand, three hundred eighty-six".