12215643535 has 4 divisors (see below), whose sum is σ = 14658772248. Its totient is φ = 9772514824.

The previous prime is 12215643449. The next prime is 12215643541. The reversal of 12215643535 is 53534651221.

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 12215643535 - 2²⁵ = 12182089103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12215643494 and 12215643503.

It is a congruent number.

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, 1221564349 + ... + 1221564358.

It is an arithmetic number, because the mean of its divisors is an integer number (3664693062).

Almost surely, 2^12215643535 is an apocalyptic number.

12215643535 is a deficient number, since it is larger than the sum of its proper divisors (2443128713).

12215643535 is an equidigital number, since it uses as much as digits as its factorization.

12215643535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443128712.

The product of its digits is 108000, while the sum is 37.

The spelling of 12215643535 in words is "twelve billion, two hundred fifteen million, six hundred forty-three thousand, five hundred thirty-five".