13453216181 has 2 divisors, whose sum is σ = 13453216182. Its totient is φ = 13453216180.

The previous prime is 13453216163. The next prime is 13453216211. The reversal of 13453216181 is 18161235431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13417515556 + 35700625 = 115834^2 + 5975^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13453216181 is a prime.

It is a super-2 number, since 2×13453216181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13453216111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6726608090 + 6726608091.

It is an arithmetic number, because the mean of its divisors is an integer number (6726608091).

Almost surely, 2^13453216181 is an apocalyptic number.

It is an amenable number.

13453216181 is a deficient number, since it is larger than the sum of its proper divisors (1).

13453216181 is an equidigital number, since it uses as much as digits as its factorization.

13453216181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 35.

The spelling of 13453216181 in words is "thirteen billion, four hundred fifty-three million, two hundred sixteen thousand, one hundred eighty-one".