12215052609 has 16 divisors (see below), whose sum is σ = 16752633792. Its totient is φ = 7911096768.

The previous prime is 12215052607. The next prime is 12215052611. The reversal of 12215052609 is 90625051221.

It is an interprime number because it is at equal distance from previous prime (12215052607) and next prime (12215052611).

It is not a de Polignac number, because 12215052609 - 2¹ = 12215052607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12215052609.

It is not an unprimeable number, because it can be changed into a prime (12215052607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11779 + ... + 156744.

It is an arithmetic number, because the mean of its divisors is an integer number (1047039612).

Almost surely, 2^12215052609 is an apocalyptic number.

It is an amenable number.

12215052609 is a deficient number, since it is larger than the sum of its proper divisors (4537581183).

12215052609 is a wasteful number, since it uses less digits than its factorization.

12215052609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169216.

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 12215052609 in words is "twelve billion, two hundred fifteen million, fifty-two thousand, six hundred nine".