7215226 has 8 divisors (see below), whose sum is σ = 10854900. Its totient is φ = 3596928.

The previous prime is 7215223. The next prime is 7215227. The reversal of 7215226 is 6225127.

It can be written as a sum of positive squares in 2 ways, for example, as 7017201 + 198025 = 2649^2 + 445^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 7215226.

It is not an unprimeable number, because it can be changed into a prime (7215223) 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, 4471 + ... + 5866.

Almost surely, 2^7215226 is an apocalyptic number.

7215226 is a deficient number, since it is larger than the sum of its proper divisors (3639674).

7215226 is a wasteful number, since it uses less digits than its factorization.

7215226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10688.

The product of its digits is 1680, while the sum is 25.

The square root of 7215226 is about 2686.1172721979. The cubic root of 7215226 is about 193.2338972082.

Subtracting from 7215226 its reverse (6225127), we obtain a palindrome (990099).

The spelling of 7215226 in words is "seven million, two hundred fifteen thousand, two hundred twenty-six".