12522215 has 8 divisors (see below), whose sum is σ = 15182160. Its totient is φ = 9914112.

The previous prime is 12522193. The next prime is 12522221. The reversal of 12522215 is 51222521.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12522215 - 2¹² = 12518119 is a prime.

It is a congruent number.

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, 12425 + ... + 13394.

It is an arithmetic number, because the mean of its divisors is an integer number (1897770).

Almost surely, 2^12522215 is an apocalyptic number.

12522215 is a deficient number, since it is larger than the sum of its proper divisors (2659945).

12522215 is an equidigital number, since it uses as much as digits as its factorization.

12522215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25921.

The product of its digits is 400, while the sum is 20.

The square root of 12522215 is about 3538.6741867541. The cubic root of 12522215 is about 232.2168441768.

Adding to 12522215 its reverse (51222521), we get a palindrome (63744736).

The spelling of 12522215 in words is "twelve million, five hundred twenty-two thousand, two hundred fifteen".