13343557081 has 2 divisors, whose sum is σ = 13343557082. Its totient is φ = 13343557080.

The previous prime is 13343557027. The next prime is 13343557147. The reversal of 13343557081 is 18075534331.

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., 12985742025 + 357815056 = 113955^2 + 18916^2 .

It is a cyclic number.

It is not a de Polignac number, because 13343557081 - 2⁷ = 13343556953 is a prime.

It is a super-2 number, since 2×13343557081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13343557021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6671778540 + 6671778541.

It is an arithmetic number, because the mean of its divisors is an integer number (6671778541).

Almost surely, 2^13343557081 is an apocalyptic number.

It is an amenable number.

13343557081 is a deficient number, since it is larger than the sum of its proper divisors (1).

13343557081 is an equidigital number, since it uses as much as digits as its factorization.

13343557081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 13343557081 in words is "thirteen billion, three hundred forty-three million, five hundred fifty-seven thousand, eighty-one".