55420577 has 2 divisors, whose sum is σ = 55420578. Its totient is φ = 55420576.

The previous prime is 55420559. The next prime is 55420583. The reversal of 55420577 is 77502455.

It is a happy number.

55420577 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45711121 + 9709456 = 6761^2 + 3116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55420577 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55420517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27710288 + 27710289.

It is an arithmetic number, because the mean of its divisors is an integer number (27710289).

Almost surely, 2^55420577 is an apocalyptic number.

It is an amenable number.

55420577 is a deficient number, since it is larger than the sum of its proper divisors (1).

55420577 is an equidigital number, since it uses as much as digits as its factorization.

55420577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49000, while the sum is 35.

The square root of 55420577 is about 7444.4997817180. The cubic root of 55420577 is about 381.2621398266.

The spelling of 55420577 in words is "fifty-five million, four hundred twenty thousand, five hundred seventy-seven".