15963 has 8 divisors (see below), whose sum is σ = 22608. Its totient is φ = 9984.

The previous prime is 15959. The next prime is 15971. The reversal of 15963 is 36951.

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

It is not a de Polignac number, because 15963 - 2² = 15959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15913) 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, 106 + ... + 207.

It is an arithmetic number, because the mean of its divisors is an integer number (2826).

2¹⁵⁹⁶³ is an apocalyptic number.

15963 is a deficient number, since it is larger than the sum of its proper divisors (6645).

15963 is a wasteful number, since it uses less digits than its factorization.

15963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333.

The product of its digits is 810, while the sum is 24.

The square root of 15963 is about 126.3447664132. The cubic root of 15963 is about 25.1789822233.

It can be divided in two parts, 159 and 63, that added together give a palindrome (222).

The spelling of 15963 in words is "fifteen thousand, nine hundred sixty-three".