55397701 has 2 divisors, whose sum is σ = 55397702. Its totient is φ = 55397700.

The previous prime is 55397689. The next prime is 55397759. The reversal of 55397701 is 10779355.

It is a happy number.

55397701 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51825601 + 3572100 = 7199^2 + 1890^2 .

It is a cyclic number.

It is not a de Polignac number, because 55397701 - 2⁹ = 55397189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55397791) 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, 27698850 + 27698851.

It is an arithmetic number, because the mean of its divisors is an integer number (27698851).

Almost surely, 2^55397701 is an apocalyptic number.

It is an amenable number.

55397701 is a deficient number, since it is larger than the sum of its proper divisors (1).

55397701 is an equidigital number, since it uses as much as digits as its factorization.

55397701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33075, while the sum is 37.

The square root of 55397701 is about 7442.9631867960. The cubic root of 55397701 is about 381.2096746384.

The spelling of 55397701 in words is "fifty-five million, three hundred ninety-seven thousand, seven hundred one".