215303 has 12 divisors (see below), whose sum is σ = 252168. Its totient is φ = 182160.

The previous prime is 215297. The next prime is 215309. The reversal of 215303 is 303512.

It is an interprime number because it is at equal distance from previous prime (215297) and next prime (215309).

It is not a de Polignac number, because 215303 - 2⁶ = 215239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5801 + ... + 5837.

It is an arithmetic number, because the mean of its divisors is an integer number (21014).

2²¹⁵³⁰³ is an apocalyptic number.

215303 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

215303 is a deficient number, since it is larger than the sum of its proper divisors (36865).

215303 is a wasteful number, since it uses less digits than its factorization.

215303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 215303 is about 464.0075430421. The cubic root of 215303 is about 59.9353934211.

Adding to 215303 its reverse (303512), we get a palindrome (518815).

Subtracting 215303 from its reverse (303512), we obtain a square (88209 = 297²).

The spelling of 215303 in words is "two hundred fifteen thousand, three hundred three".