13453532321 has 2 divisors, whose sum is σ = 13453532322. Its totient is φ = 13453532320.

The previous prime is 13453532317. The next prime is 13453532353. The reversal of 13453532321 is 12323535431.

It is an a-pointer prime, because the next prime (13453532353) can be obtained adding 13453532321 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11514363025 + 1939169296 = 107305^2 + 44036^2 .

It is a cyclic number.

It is not a de Polignac number, because 13453532321 - 2² = 13453532317 is a prime.

It is not a weakly prime, because it can be changed into another prime (13453532381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6726766160 + 6726766161.

It is an arithmetic number, because the mean of its divisors is an integer number (6726766161).

Almost surely, 2^13453532321 is an apocalyptic number.

It is an amenable number.

13453532321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13453532321 is an equidigital number, since it uses as much as digits as its factorization.

13453532321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 32.

The spelling of 13453532321 in words is "thirteen billion, four hundred fifty-three million, five hundred thirty-two thousand, three hundred twenty-one".