55299791 has 2 divisors, whose sum is σ = 55299792. Its totient is φ = 55299790.

The previous prime is 55299767. The next prime is 55299799. The reversal of 55299791 is 19799255.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55299791 - 2²² = 51105487 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55299799) 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, 27649895 + 27649896.

It is an arithmetic number, because the mean of its divisors is an integer number (27649896).

Almost surely, 2^55299791 is an apocalyptic number.

55299791 is a deficient number, since it is larger than the sum of its proper divisors (1).

55299791 is an equidigital number, since it uses as much as digits as its factorization.

55299791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 255150, while the sum is 47.

The square root of 55299791 is about 7436.3829245138. The cubic root of 55299791 is about 380.9849586354.

The spelling of 55299791 in words is "fifty-five million, two hundred ninety-nine thousand, seven hundred ninety-one".