13550261 has 4 divisors (see below), whose sum is σ = 13684524. Its totient is φ = 13416000.

The previous prime is 13550237. The next prime is 13550263. The reversal of 13550261 is 16205531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16205531 = 739 ⋅21929.

It can be written as a sum of positive squares in 2 ways, for example, as 9060100 + 4490161 = 3010^2 + 2119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13550261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13550263) 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 3 ways as a sum of consecutive naturals, for example, 66980 + ... + 67181.

It is an arithmetic number, because the mean of its divisors is an integer number (3421131).

Almost surely, 2^13550261 is an apocalyptic number.

It is an amenable number.

13550261 is a deficient number, since it is larger than the sum of its proper divisors (134263).

13550261 is a wasteful number, since it uses less digits than its factorization.

13550261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134262.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 13550261 is about 3681.0679157006. The cubic root of 13550261 is about 238.4052894811.

Adding to 13550261 its reverse (16205531), we get a palindrome (29755792).

The spelling of 13550261 in words is "thirteen million, five hundred fifty thousand, two hundred sixty-one".