13321181 has 2 divisors, whose sum is σ = 13321182. Its totient is φ = 13321180.

The previous prime is 13321171. The next prime is 13321211. The reversal of 13321181 is 18112331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7513081 + 5808100 = 2741^2 + 2410^2 .

It is a cyclic number.

It is not a de Polignac number, because 13321181 - 2¹⁰ = 13320157 is a prime.

It is a super-2 number, since 2×13321181² = 354907726469522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13321111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6660590 + 6660591.

It is an arithmetic number, because the mean of its divisors is an integer number (6660591).

Almost surely, 2^13321181 is an apocalyptic number.

It is an amenable number.

13321181 is a deficient number, since it is larger than the sum of its proper divisors (1).

13321181 is an equidigital number, since it uses as much as digits as its factorization.

13321181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 20.

The square root of 13321181 is about 3649.8193105961. The cubic root of 13321181 is about 237.0541574798.

The spelling of 13321181 in words is "thirteen million, three hundred twenty-one thousand, one hundred eighty-one".