215247 has 8 divisors (see below), whose sum is σ = 289456. Its totient is φ = 142272.

The previous prime is 215239. The next prime is 215249. The reversal of 215247 is 742512.

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

It is not a de Polignac number, because 215247 - 2³ = 215239 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11 and base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 215247.

It is not an unprimeable number, because it can be changed into a prime (215249) 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, 243 + ... + 699.

It is an arithmetic number, because the mean of its divisors is an integer number (36182).

2²¹⁵²⁴⁷ is an apocalyptic number.

215247 is a deficient number, since it is larger than the sum of its proper divisors (74209).

215247 is a wasteful number, since it uses less digits than its factorization.

215247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617.

The product of its digits is 560, while the sum is 21.

The square root of 215247 is about 463.9471952712. The cubic root of 215247 is about 59.9301966007.

Adding to 215247 its reverse (742512), we get a palindrome (957759).

The spelling of 215247 in words is "two hundred fifteen thousand, two hundred forty-seven".