55775549 has 2 divisors, whose sum is σ = 55775550. Its totient is φ = 55775548.

The previous prime is 55775537. The next prime is 55775561. The reversal of 55775549 is 94557755.

55775549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (55775537) and next prime (55775561).

It can be written as a sum of positive squares in only one way, i.e., 31696900 + 24078649 = 5630^2 + 4907^2 .

It is a cyclic number.

It is not a de Polignac number, because 55775549 - 2¹² = 55771453 is a prime.

It is a super-2 number, since 2×55775549² = 6221823732502802, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55775509) 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, 27887774 + 27887775.

It is an arithmetic number, because the mean of its divisors is an integer number (27887775).

Almost surely, 2^55775549 is an apocalyptic number.

It is an amenable number.

55775549 is a deficient number, since it is larger than the sum of its proper divisors (1).

55775549 is an equidigital number, since it uses as much as digits as its factorization.

55775549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102500, while the sum is 47.

The square root of 55775549 is about 7468.3029531481. The cubic root of 55775549 is about 382.0744100910.

The spelling of 55775549 in words is "fifty-five million, seven hundred seventy-five thousand, five hundred forty-nine".