7215 has 16 divisors (see below), whose sum is σ = 12768. Its totient is φ = 3456.

The previous prime is 7213. The next prime is 7219. The reversal of 7215 is 5127.

It is a happy number.

It is not a de Polignac number, because 7215 - 2¹ = 7213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

7215 is a lucky number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 7194 and 7203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177 + ... + 213.

It is an arithmetic number, because the mean of its divisors is an integer number (798).

2⁷²¹⁵ is an apocalyptic number.

7215 is a deficient number, since it is larger than the sum of its proper divisors (5553).

7215 is a wasteful number, since it uses less digits than its factorization.

7215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58.

The product of its digits is 70, while the sum is 15.

The square root of 7215 is about 84.9411561023. The cubic root of 7215 is about 19.3231879655.

It can be divided in two parts, 7 and 215, that added together give a palindrome (222).

The spelling of 7215 in words is "seven thousand, two hundred fifteen".