215963 has 8 divisors (see below), whose sum is σ = 244080. Its totient is φ = 189280.

The previous prime is 215959. The next prime is 215981. The reversal of 215963 is 369512.

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 215963 - 2² = 215959 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 215963.

It is not an unprimeable number, because it can be changed into a prime (215953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20 + ... + 657.

It is an arithmetic number, because the mean of its divisors is an integer number (30510).

2²¹⁵⁹⁶³ is an apocalyptic number.

215963 is a deficient number, since it is larger than the sum of its proper divisors (28117).

215963 is a wasteful number, since it uses less digits than its factorization.

215963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717.

The product of its digits is 1620, while the sum is 26.

The square root of 215963 is about 464.7181941779. The cubic root of 215963 is about 59.9965738784.

It can be divided in two parts, 2159 and 63, that added together give a palindrome (2222).

The spelling of 215963 in words is "two hundred fifteen thousand, nine hundred sixty-three".