215283 has 4 divisors (see below), whose sum is σ = 287048. Its totient is φ = 143520.

The previous prime is 215279. The next prime is 215297. The reversal of 215283 is 382512.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 215283 - 2² = 215279 is a prime.

It is a D-number.

It is a Duffinian number.

215283 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (215273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35878 + ... + 35883.

It is an arithmetic number, because the mean of its divisors is an integer number (71762).

2²¹⁵²⁸³ is an apocalyptic number.

215283 is a deficient number, since it is larger than the sum of its proper divisors (71765).

215283 is an equidigital number, since it uses as much as digits as its factorization.

215283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71764.

The product of its digits is 480, while the sum is 21.

The square root of 215283 is about 463.9859911678. The cubic root of 215283 is about 59.9335375173.

Adding to 215283 its reverse (382512), we get a palindrome (597795).

The spelling of 215283 in words is "two hundred fifteen thousand, two hundred eighty-three".