12215822508 has 36 divisors (see below), whose sum is σ = 30892629768. Its totient is φ = 4070128320.

The previous prime is 12215822417. The next prime is 12215822539. The reversal of 12215822508 is 80522851221.

12215822508 is a `hidden beast` number, since 1 + 2 + 21 + 582 + 2 + 50 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7735 + ... + 156497.

Almost surely, 2^12215822508 is an apocalyptic number.

12215822508 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12215822508 is an abundant number, since it is smaller than the sum of its proper divisors (18676807260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12215822508 is a wasteful number, since it uses less digits than its factorization.

12215822508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151054 (or 151049 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

The spelling of 12215822508 in words is "twelve billion, two hundred fifteen million, eight hundred twenty-two thousand, five hundred eight".