55804043 has 2 divisors, whose sum is σ = 55804044. Its totient is φ = 55804042.

The previous prime is 55804039. The next prime is 55804051. The reversal of 55804043 is 34040855.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55804043 - 2² = 55804039 is a prime.

It is a super-2 number, since 2×55804043² = 6228182430291698, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 55803997 and 55804015.

It is not a weakly prime, because it can be changed into another prime (55804543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27902021 + 27902022.

It is an arithmetic number, because the mean of its divisors is an integer number (27902022).

Almost surely, 2^55804043 is an apocalyptic number.

55804043 is a deficient number, since it is larger than the sum of its proper divisors (1).

55804043 is an equidigital number, since it uses as much as digits as its factorization.

55804043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 55804043 is about 7470.2103718704. The cubic root of 55804043 is about 382.1394623409.

Adding to 55804043 its reverse (34040855), we get a palindrome (89844898).

The spelling of 55804043 in words is "fifty-five million, eight hundred four thousand, forty-three".