12212515 has 16 divisors (see below), whose sum is σ = 17092800. Its totient is φ = 8373120.

The previous prime is 12212507. The next prime is 12212521. The reversal of 12212515 is 51521221.

12212515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12212515 - 2³ = 12212507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12212492 and 12212501.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1846 + ... + 5275.

It is an arithmetic number, because the mean of its divisors is an integer number (1068300).

Almost surely, 2^12212515 is an apocalyptic number.

12212515 is a deficient number, since it is larger than the sum of its proper divisors (4880285).

12212515 is an frugal number, since it uses more digits than its factorization.

12212515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7147 (or 7133 counting only the distinct ones).

The product of its digits is 200, while the sum is 19.

The square root of 12212515 is about 3494.6408971452. The cubic root of 12212515 is about 230.2864421086.

Adding to 12212515 its reverse (51521221), we get a palindrome (63733736).

The spelling of 12212515 in words is "twelve million, two hundred twelve thousand, five hundred fifteen".