55718261 has 2 divisors, whose sum is σ = 55718262. Its totient is φ = 55718260.

The previous prime is 55718249. The next prime is 55718281. The reversal of 55718261 is 16281755.

55718261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54302161 + 1416100 = 7369^2 + 1190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55718261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55718281) 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 as a sum of consecutive naturals, namely, 27859130 + 27859131.

It is an arithmetic number, because the mean of its divisors is an integer number (27859131).

Almost surely, 2^55718261 is an apocalyptic number.

It is an amenable number.

55718261 is a deficient number, since it is larger than the sum of its proper divisors (1).

55718261 is an equidigital number, since it uses as much as digits as its factorization.

55718261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 35.

The square root of 55718261 is about 7464.4665583014. The cubic root of 55718261 is about 381.9435536051.

The spelling of 55718261 in words is "fifty-five million, seven hundred eighteen thousand, two hundred sixty-one".