7215113 has 4 divisors (see below), whose sum is σ = 7463940. Its totient is φ = 6966288.

The previous prime is 7215067. The next prime is 7215119. The reversal of 7215113 is 3115127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3115127 = 983 ⋅3169.

It can be written as a sum of positive squares in 2 ways, for example, as 5438224 + 1776889 = 2332^2 + 1333^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7215113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7215119) 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, 124370 + ... + 124427.

It is an arithmetic number, because the mean of its divisors is an integer number (1865985).

Almost surely, 2^7215113 is an apocalyptic number.

It is an amenable number.

7215113 is a deficient number, since it is larger than the sum of its proper divisors (248827).

7215113 is a wasteful number, since it uses less digits than its factorization.

7215113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248826.

The product of its digits is 210, while the sum is 20.

The square root of 7215113 is about 2686.0962380376. The cubic root of 7215113 is about 193.2328884367.

The spelling of 7215113 in words is "seven million, two hundred fifteen thousand, one hundred thirteen".