13055581 has 8 divisors (see below), whose sum is σ = 16277184. Its totient is φ = 10173120.

The previous prime is 13055569. The next prime is 13055587. The reversal of 13055581 is 18555031.

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 13055581 - 2⁷ = 13055453 is a prime.

It is a super-2 number, since 2×13055581² = 340896390495122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13055587) 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, 84700 + ... + 84853.

It is an arithmetic number, because the mean of its divisors is an integer number (2034648).

Almost surely, 2^13055581 is an apocalyptic number.

13055581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13055581 is a deficient number, since it is larger than the sum of its proper divisors (3221603).

13055581 is a wasteful number, since it uses less digits than its factorization.

13055581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169571.

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 13055581 is about 3613.2507524389. The cubic root of 13055581 is about 235.4680936996.

It can be divided in two parts, 1305 and 5581, that added together give a palindrome (6886).

The spelling of 13055581 in words is "thirteen million, fifty-five thousand, five hundred eighty-one".