7172215 has 16 divisors (see below), whose sum is σ = 9594720. Its totient is φ = 5114880.

The previous prime is 7172201. The next prime is 7172219. The reversal of 7172215 is 5122717.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-7172215 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7172215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7172219) 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, 606 + ... + 3835.

It is an arithmetic number, because the mean of its divisors is an integer number (599670).

Almost surely, 2^7172215 is an apocalyptic number.

7172215 is a deficient number, since it is larger than the sum of its proper divisors (2422505).

7172215 is a wasteful number, since it uses less digits than its factorization.

7172215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4482.

The product of its digits is 980, while the sum is 25.

The square root of 7172215 is about 2678.0991393150. The cubic root of 7172215 is about 192.8491666961.

The spelling of 7172215 in words is "seven million, one hundred seventy-two thousand, two hundred fifteen".