13168552321 has 4 divisors (see below), whose sum is σ = 13215084592. Its totient is φ = 13122020052.

The previous prime is 13168552307. The next prime is 13168552343. The reversal of 13168552321 is 12325586131.

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 13168552321 - 2⁵ = 13168552289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13168552301) 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, 23265711 + ... + 23266276.

It is an arithmetic number, because the mean of its divisors is an integer number (3303771148).

Almost surely, 2^13168552321 is an apocalyptic number.

It is an amenable number.

13168552321 is a deficient number, since it is larger than the sum of its proper divisors (46532271).

13168552321 is an equidigital number, since it uses as much as digits as its factorization.

13168552321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46532270.

The product of its digits is 43200, while the sum is 37.

The spelling of 13168552321 in words is "thirteen billion, one hundred sixty-eight million, five hundred fifty-two thousand, three hundred twenty-one".