12215500515 has 64 divisors (see below), whose sum is σ = 22206643200. Its totient is φ = 6369518592.

The previous prime is 12215500511. The next prime is 12215500519. The reversal of 12215500515 is 51500551221.

It is an interprime number because it is at equal distance from previous prime (12215500511) and next prime (12215500519).

It is not a de Polignac number, because 12215500515 - 2² = 12215500511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12215500511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1081266 + ... + 1092504.

It is an arithmetic number, because the mean of its divisors is an integer number (346978800).

Almost surely, 2^12215500515 is an apocalyptic number.

12215500515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12215500515 is a deficient number, since it is larger than the sum of its proper divisors (9991142685).

12215500515 is a wasteful number, since it uses less digits than its factorization.

12215500515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11433 (or 11427 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The spelling of 12215500515 in words is "twelve billion, two hundred fifteen million, five hundred thousand, five hundred fifteen".