663215 has 12 divisors (see below), whose sum is σ = 926136. Its totient is φ = 454608.

The previous prime is 663209. The next prime is 663239. The reversal of 663215 is 512366.

It is not a de Polignac number, because 663215 - 2¹⁴ = 646831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1109 + ... + 1598.

It is an arithmetic number, because the mean of its divisors is an integer number (77178).

2⁶⁶³²¹⁵ is an apocalyptic number.

663215 is a deficient number, since it is larger than the sum of its proper divisors (262921).

663215 is a wasteful number, since it uses less digits than its factorization.

663215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2726 (or 2719 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 663215 is about 814.3801323706. The cubic root of 663215 is about 87.2070200981.

It can be divided in two parts, 663 and 215, that added together give a palindrome (878).

The spelling of 663215 in words is "six hundred sixty-three thousand, two hundred fifteen".