247215 has 8 divisors (see below), whose sum is σ = 395568. Its totient is φ = 131840.

The previous prime is 247201. The next prime is 247223. The reversal of 247215 is 512742.

247215 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 247215 - 2⁵ = 247183 is a prime.

It is a super-2 number, since 2×247215² = 122230512450, which contains 22 as substring.

247215 is strictly pandigital in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 247191 and 247200.

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 247215.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8226 + ... + 8255.

It is an arithmetic number, because the mean of its divisors is an integer number (49446).

2²⁴⁷²¹⁵ is an apocalyptic number.

247215 is a deficient number, since it is larger than the sum of its proper divisors (148353).

247215 is a wasteful number, since it uses less digits than its factorization.

247215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16489.

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

The square root of 247215 is about 497.2072002697. The cubic root of 247215 is about 62.7612530942.

Adding to 247215 its reverse (512742), we get a palindrome (759957).

The spelling of 247215 in words is "two hundred forty-seven thousand, two hundred fifteen".