55844861 has 2 divisors, whose sum is σ = 55844862. Its totient is φ = 55844860.

The previous prime is 55844843. The next prime is 55844869. The reversal of 55844861 is 16844855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31292836 + 24552025 = 5594^2 + 4955^2 .

It is a cyclic number.

It is not a de Polignac number, because 55844861 - 2⁶ = 55844797 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55844869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27922430 + 27922431.

It is an arithmetic number, because the mean of its divisors is an integer number (27922431).

Almost surely, 2^55844861 is an apocalyptic number.

It is an amenable number.

55844861 is a deficient number, since it is larger than the sum of its proper divisors (1).

55844861 is an equidigital number, since it uses as much as digits as its factorization.

55844861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 153600, while the sum is 41.

The square root of 55844861 is about 7472.9419240350. The cubic root of 55844861 is about 382.2326119060.

The spelling of 55844861 in words is "fifty-five million, eight hundred forty-four thousand, eight hundred sixty-one".