11255581 has 8 divisors (see below), whose sum is σ = 12545280. Its totient is φ = 10035648.

The previous prime is 11255561. The next prime is 11255603. The reversal of 11255581 is 18555211.

11255581 is nontrivially palindromic in base 14.

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

It is not a de Polignac number, because 11255581 - 2⁵ = 11255549 is a prime.

It is a super-2 number, since 2×11255581² = 253376207295122, 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 (11255561) 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, 17101 + ... + 17746.

It is an arithmetic number, because the mean of its divisors is an integer number (1568160).

Almost surely, 2^11255581 is an apocalyptic number.

It is an amenable number.

11255581 is a deficient number, since it is larger than the sum of its proper divisors (1289699).

11255581 is a wasteful number, since it uses less digits than its factorization.

11255581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34883.

The product of its digits is 2000, while the sum is 28.

The square root of 11255581 is about 3354.9338294518. The cubic root of 11255581 is about 224.1072841207.

The spelling of 11255581 in words is "eleven million, two hundred fifty-five thousand, five hundred eighty-one".