13033552321 has 4 divisors (see below), whose sum is σ = 13072928944. Its totient is φ = 12994175700.

The previous prime is 13033552313. The next prime is 13033552381. The reversal of 13033552321 is 12325533031.

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 13033552321 - 2³ = 13033552313 is a prime.

It is a super-2 number, since 2×13033552321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13033552321.

It is not an unprimeable number, because it can be changed into a prime (13033552381) 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, 19687815 + ... + 19688476.

It is an arithmetic number, because the mean of its divisors is an integer number (3268232236).

Almost surely, 2^13033552321 is an apocalyptic number.

It is an amenable number.

13033552321 is a deficient number, since it is larger than the sum of its proper divisors (39376623).

13033552321 is an equidigital number, since it uses as much as digits as its factorization.

13033552321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39376622.

The product of its (nonzero) digits is 8100, while the sum is 28.

The spelling of 13033552321 in words is "thirteen billion, thirty-three million, five hundred fifty-two thousand, three hundred twenty-one".