55816811 has 2 divisors, whose sum is σ = 55816812. Its totient is φ = 55816810.

The previous prime is 55816799. The next prime is 55816819. The reversal of 55816811 is 11861855.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55816811 - 2²² = 51622507 is a prime.

It is not a weakly prime, because it can be changed into another prime (55816819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27908405 + 27908406.

It is an arithmetic number, because the mean of its divisors is an integer number (27908406).

Almost surely, 2^55816811 is an apocalyptic number.

55816811 is a deficient number, since it is larger than the sum of its proper divisors (1).

55816811 is an equidigital number, since it uses as much as digits as its factorization.

55816811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 35.

The square root of 55816811 is about 7471.0649173997. The cubic root of 55816811 is about 382.1686047012.

The spelling of 55816811 in words is "fifty-five million, eight hundred sixteen thousand, eight hundred eleven".