48778181 has 2 divisors, whose sum is σ = 48778182. Its totient is φ = 48778180.

The previous prime is 48778157. The next prime is 48778189. The reversal of 48778181 is 18187784.

48778181 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., 26357956 + 22420225 = 5134^2 + 4735^2 .

It is a cyclic number.

It is not a de Polignac number, because 48778181 - 2¹⁸ = 48516037 is a prime.

It is a super-2 number, since 2×48778181² = 4758621883337522, 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 (48778189) 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, 24389090 + 24389091.

It is an arithmetic number, because the mean of its divisors is an integer number (24389091).

Almost surely, 2^48778181 is an apocalyptic number.

It is an amenable number.

48778181 is a deficient number, since it is larger than the sum of its proper divisors (1).

48778181 is an equidigital number, since it uses as much as digits as its factorization.

48778181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100352, while the sum is 44.

The square root of 48778181 is about 6984.1378136460. The cubic root of 48778181 is about 365.3775564026.

The spelling of 48778181 in words is "forty-eight million, seven hundred seventy-eight thousand, one hundred eighty-one".