12215510533 has 4 divisors (see below), whose sum is σ = 12858432160. Its totient is φ = 11572588908.

The previous prime is 12215510507. The next prime is 12215510539. The reversal of 12215510533 is 33501551221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12215510533 - 2⁵ = 12215510501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215510539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321460785 + ... + 321460822.

It is an arithmetic number, because the mean of its divisors is an integer number (3214608040).

Almost surely, 2^12215510533 is an apocalyptic number.

It is an amenable number.

12215510533 is a deficient number, since it is larger than the sum of its proper divisors (642921627).

12215510533 is an equidigital number, since it uses as much as digits as its factorization.

12215510533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642921626.

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 12215510533 in words is "twelve billion, two hundred fifteen million, five hundred ten thousand, five hundred thirty-three".