55040261 has 2 divisors, whose sum is σ = 55040262. Its totient is φ = 55040260.

The previous prime is 55040233. The next prime is 55040263. The reversal of 55040261 is 16204055.

55040261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54390625 + 649636 = 7375^2 + 806^2 .

It is a cyclic number.

It is not a de Polignac number, because 55040261 - 2⁶ = 55040197 is a prime.

Together with 55040263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55040263) 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, 27520130 + 27520131.

It is an arithmetic number, because the mean of its divisors is an integer number (27520131).

Almost surely, 2^55040261 is an apocalyptic number.

It is an amenable number.

55040261 is a deficient number, since it is larger than the sum of its proper divisors (1).

55040261 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 12 representation: 55040261 = (16524005)₁₂.

55040261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 55040261 is about 7418.9123865968. The cubic root of 55040261 is about 380.3880177878.

The spelling of 55040261 in words is "fifty-five million, forty thousand, two hundred sixty-one".