13045502321 has 4 divisors (see below), whose sum is σ = 13045859700. Its totient is φ = 13045144944.

The previous prime is 13045502317. The next prime is 13045502333. The reversal of 13045502321 is 12320554031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4126777600 + 8918724721 = 64240^2 + 94439^2 .

It is a cyclic number.

It is not a de Polignac number, because 13045502321 - 2² = 13045502317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13045502621) 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, 116786 + ... + 199323.

It is an arithmetic number, because the mean of its divisors is an integer number (3261464925).

Almost surely, 2^13045502321 is an apocalyptic number.

It is an amenable number.

13045502321 is a deficient number, since it is larger than the sum of its proper divisors (357379).

13045502321 is an equidigital number, since it uses as much as digits as its factorization.

13045502321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357378.

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 13045502321 in words is "thirteen billion, forty-five million, five hundred two thousand, three hundred twenty-one".