13318581 has 8 divisors (see below), whose sum is σ = 17817184. Its totient is φ = 8849520.

The previous prime is 13318573. The next prime is 13318589. The reversal of 13318581 is 18581331.

It is an interprime number because it is at equal distance from previous prime (13318573) and next prime (13318589).

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

It is not a de Polignac number, because 13318581 - 2³ = 13318573 is a prime.

It is a super-2 number, since 2×13318581² = 354769199707122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13318589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6310 + ... + 8151.

It is an arithmetic number, because the mean of its divisors is an integer number (2227148).

Almost surely, 2^13318581 is an apocalyptic number.

It is an amenable number.

13318581 is a deficient number, since it is larger than the sum of its proper divisors (4498603).

13318581 is a wasteful number, since it uses less digits than its factorization.

13318581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14771.

The product of its digits is 2880, while the sum is 30.

The square root of 13318581 is about 3649.4631111987. The cubic root of 13318581 is about 237.0387338996.

The spelling of 13318581 in words is "thirteen million, three hundred eighteen thousand, five hundred eighty-one".