55205767 has 2 divisors, whose sum is σ = 55205768. Its totient is φ = 55205766.

The previous prime is 55205677. The next prime is 55205797. The reversal of 55205767 is 76750255.

Together with previous prime (55205677) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55205767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55205797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27602883 + 27602884.

It is an arithmetic number, because the mean of its divisors is an integer number (27602884).

Almost surely, 2^55205767 is an apocalyptic number.

55205767 is a deficient number, since it is larger than the sum of its proper divisors (1).

55205767 is an equidigital number, since it uses as much as digits as its factorization.

55205767 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73500, while the sum is 37.

The square root of 55205767 is about 7430.0583443200. The cubic root of 55205767 is about 380.7689117005.

The spelling of 55205767 in words is "fifty-five million, two hundred five thousand, seven hundred sixty-seven".