55205797 has 2 divisors, whose sum is σ = 55205798. Its totient is φ = 55205796.

The previous prime is 55205767. The next prime is 55205809. The reversal of 55205797 is 79750255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54375876 + 829921 = 7374^2 + 911^2 .

It is a cyclic number.

It is not a de Polignac number, because 55205797 - 2⁷ = 55205669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55205767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27602898 + 27602899.

It is an arithmetic number, because the mean of its divisors is an integer number (27602899).

Almost surely, 2^55205797 is an apocalyptic number.

It is an amenable number.

55205797 is a deficient number, since it is larger than the sum of its proper divisors (1).

55205797 is an equidigital number, since it uses as much as digits as its factorization.

55205797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110250, while the sum is 40.

The square root of 55205797 is about 7430.0603631465. The cubic root of 55205797 is about 380.7689806732.

The spelling of 55205797 in words is "fifty-five million, two hundred five thousand, seven hundred ninety-seven".