55782169 has 2 divisors, whose sum is σ = 55782170. Its totient is φ = 55782168.

The previous prime is 55782161. The next prime is 55782191. The reversal of 55782169 is 96128755.

55782169 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., 46854025 + 8928144 = 6845^2 + 2988^2 .

It is a cyclic number.

It is not a de Polignac number, because 55782169 - 2³ = 55782161 is a prime.

It is a super-2 number, since 2×55782169² = 6223300756689122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55782161) 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, 27891084 + 27891085.

It is an arithmetic number, because the mean of its divisors is an integer number (27891085).

Almost surely, 2^55782169 is an apocalyptic number.

It is an amenable number.

55782169 is a deficient number, since it is larger than the sum of its proper divisors (1).

55782169 is an equidigital number, since it uses as much as digits as its factorization.

55782169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 43.

The square root of 55782169 is about 7468.7461464425. The cubic root of 55782169 is about 382.0895256304.

The spelling of 55782169 in words is "fifty-five million, seven hundred eighty-two thousand, one hundred sixty-nine".