12210515 has 4 divisors (see below), whose sum is σ = 14652624. Its totient is φ = 9768408.

The previous prime is 12210503. The next prime is 12210563. The reversal of 12210515 is 51501221.

12210515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12210515 - 2²⁰ = 11161939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12210493 and 12210502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1221047 + ... + 1221056.

It is an arithmetic number, because the mean of its divisors is an integer number (3663156).

Almost surely, 2^12210515 is an apocalyptic number.

12210515 is a deficient number, since it is larger than the sum of its proper divisors (2442109).

12210515 is an equidigital number, since it uses as much as digits as its factorization.

12210515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442108.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 12210515 is about 3494.3547329943. The cubic root of 12210515 is about 230.2738703593.

Adding to 12210515 its reverse (51501221), we get a palindrome (63711736).

The spelling of 12210515 in words is "twelve million, two hundred ten thousand, five hundred fifteen".