12552421533 has 4 divisors (see below), whose sum is σ = 16736562048. Its totient is φ = 8368281020.

The previous prime is 12552421517. The next prime is 12552421547. The reversal of 12552421533 is 33512425521.

12552421533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12552421533 - 2⁴ = 12552421517 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12552421494 and 12552421503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12552421333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2092070253 + ... + 2092070258.

It is an arithmetic number, because the mean of its divisors is an integer number (4184140512).

Almost surely, 2^12552421533 is an apocalyptic number.

It is an amenable number.

12552421533 is a deficient number, since it is larger than the sum of its proper divisors (4184140515).

12552421533 is an equidigital number, since it uses as much as digits as its factorization.

12552421533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4184140514.

The product of its digits is 36000, while the sum is 33.

The spelling of 12552421533 in words is "twelve billion, five hundred fifty-two million, four hundred twenty-one thousand, five hundred thirty-three".