12215115 has 24 divisors (see below), whose sum is σ = 23098608. Its totient is φ = 5922240.

The previous prime is 12215101. The next prime is 12215123. The reversal of 12215115 is 51151221.

12215115 = 444² + 445² + ... + 498².

It is not a de Polignac number, because 12215115 - 2¹⁵ = 12182347 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 11844 + ... + 12833.

It is an arithmetic number, because the mean of its divisors is an integer number (962442).

Almost surely, 2^12215115 is an apocalyptic number.

12215115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12215115 is a deficient number, since it is larger than the sum of its proper divisors (10883493).

12215115 is a wasteful number, since it uses less digits than its factorization.

12215115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24699 (or 24696 counting only the distinct ones).

The product of its digits is 100, while the sum is 18.

The square root of 12215115 is about 3495.0128755128. The cubic root of 12215115 is about 230.3027833308.

Adding to 12215115 its reverse (51151221), we get a palindrome (63366336).

It can be divided in two parts, 1221 and 5115, that added together give a palindrome (6336).

The spelling of 12215115 in words is "twelve million, two hundred fifteen thousand, one hundred fifteen".