216353 has 8 divisors (see below), whose sum is σ = 232800. Its totient is φ = 200448.

The previous prime is 216347. The next prime is 216371. The reversal of 216353 is 353612.

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

It is a cyclic number.

It is not a de Polignac number, because 216353 - 2⁶ = 216289 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (216373) 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, 1025 + ... + 1217.

It is an arithmetic number, because the mean of its divisors is an integer number (29100).

2²¹⁶³⁵³ is an apocalyptic number.

It is an amenable number.

216353 is a deficient number, since it is larger than the sum of its proper divisors (16447).

216353 is a wasteful number, since it uses less digits than its factorization.

216353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271.

The product of its digits is 540, while the sum is 20.

The square root of 216353 is about 465.1376140456. The cubic root of 216353 is about 60.0326673960.

Adding to 216353 its reverse (353612), we get a palindrome (569965).

The spelling of 216353 in words is "two hundred sixteen thousand, three hundred fifty-three".