12212315 has 4 divisors (see below), whose sum is σ = 14654784. Its totient is φ = 9769848.

The previous prime is 12212311. The next prime is 12212327. The reversal of 12212315 is 51321221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12212315 - 2² = 12212311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212293 and 12212302.

It is not an unprimeable number, because it can be changed into a prime (12212311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1221227 + ... + 1221236.

It is an arithmetic number, because the mean of its divisors is an integer number (3663696).

Almost surely, 2^12212315 is an apocalyptic number.

12212315 is a deficient number, since it is larger than the sum of its proper divisors (2442469).

12212315 is an equidigital number, since it uses as much as digits as its factorization.

12212315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2442468.

The product of its digits is 120, while the sum is 17.

The square root of 12212315 is about 3494.6122817846. The cubic root of 12212315 is about 230.2851849954.

Adding to 12212315 its reverse (51321221), we get a palindrome (63533536).

The spelling of 12212315 in words is "twelve million, two hundred twelve thousand, three hundred fifteen".