13213081 has 8 divisors (see below), whose sum is σ = 15133824. Its totient is φ = 11300640.

The previous prime is 13213069. The next prime is 13213087. The reversal of 13213081 is 18031231.

13213081 is nontrivially palindromic in base 5.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13213081 - 2¹⁵ = 13180313 is a prime.

It is a super-2 number, since 2×13213081² = 349171019025122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13213087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1836 + ... + 5458.

It is an arithmetic number, because the mean of its divisors is an integer number (1891728).

Almost surely, 2^13213081 is an apocalyptic number.

It is an amenable number.

13213081 is a deficient number, since it is larger than the sum of its proper divisors (1920743).

13213081 is an equidigital number, since it uses as much as digits as its factorization.

13213081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4151.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 13213081 is about 3634.9801925182. The cubic root of 13213081 is about 236.4111918434.

Adding to 13213081 its product of nonzero digits (144), we get a square (13213225 = 3635²).

The spelling of 13213081 in words is "thirteen million, two hundred thirteen thousand, eighty-one".