55835821 has 2 divisors, whose sum is σ = 55835822. Its totient is φ = 55835820.

The previous prime is 55835807. The next prime is 55835839. The reversal of 55835821 is 12853855.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32661225 + 23174596 = 5715^2 + 4814^2 .

It is a cyclic number.

It is not a de Polignac number, because 55835821 - 2⁷ = 55835693 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 (55835621) 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, 27917910 + 27917911.

It is an arithmetic number, because the mean of its divisors is an integer number (27917911).

Almost surely, 2^55835821 is an apocalyptic number.

It is an amenable number.

55835821 is a deficient number, since it is larger than the sum of its proper divisors (1).

55835821 is an equidigital number, since it uses as much as digits as its factorization.

55835821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48000, while the sum is 37.

The square root of 55835821 is about 7472.3370507493. The cubic root of 55835821 is about 382.2119859002.

The spelling of 55835821 in words is "fifty-five million, eight hundred thirty-five thousand, eight hundred twenty-one".