55727197 has 2 divisors, whose sum is σ = 55727198. Its totient is φ = 55727196.

The previous prime is 55727167. The next prime is 55727213. The reversal of 55727197 is 79172755.

55727197 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., 32936121 + 22791076 = 5739^2 + 4774^2 .

It is a cyclic number.

It is not a de Polignac number, because 55727197 - 2²³ = 47338589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55727167) 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, 27863598 + 27863599.

It is an arithmetic number, because the mean of its divisors is an integer number (27863599).

Almost surely, 2^55727197 is an apocalyptic number.

It is an amenable number.

55727197 is a deficient number, since it is larger than the sum of its proper divisors (1).

55727197 is an equidigital number, since it uses as much as digits as its factorization.

55727197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 154350, while the sum is 43.

The square root of 55727197 is about 7465.0651035339. The cubic root of 55727197 is about 381.9639709996.

It can be divided in two parts, 5572 and 7197, that added together give a square (12769 = 113²).

The spelling of 55727197 in words is "fifty-five million, seven hundred twenty-seven thousand, one hundred ninety-seven".