55381771 has 2 divisors, whose sum is σ = 55381772. Its totient is φ = 55381770.

The previous prime is 55381741. The next prime is 55381819. The reversal of 55381771 is 17718355.

55381771 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 is a cyclic number.

It is not a de Polignac number, because 55381771 - 2⁷ = 55381643 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55381771.

It is not a weakly prime, because it can be changed into another prime (55381741) 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, 27690885 + 27690886.

It is an arithmetic number, because the mean of its divisors is an integer number (27690886).

Almost surely, 2^55381771 is an apocalyptic number.

55381771 is a deficient number, since it is larger than the sum of its proper divisors (1).

55381771 is an equidigital number, since it uses as much as digits as its factorization.

55381771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29400, while the sum is 37.

The square root of 55381771 is about 7441.8929715496. The cubic root of 55381771 is about 381.1731312911.

The spelling of 55381771 in words is "fifty-five million, three hundred eighty-one thousand, seven hundred seventy-one".