52781881 has 2 divisors, whose sum is σ = 52781882. Its totient is φ = 52781880.

The previous prime is 52781873. The next prime is 52781887. The reversal of 52781881 is 18818725.

52781881 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., 37100281 + 15681600 = 6091^2 + 3960^2 .

It is a cyclic number.

It is not a de Polignac number, because 52781881 - 2³ = 52781873 is a prime.

It is a super-2 number, since 2×52781881² = 5571853923796322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (52781887) 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, 26390940 + 26390941.

It is an arithmetic number, because the mean of its divisors is an integer number (26390941).

Almost surely, 2^52781881 is an apocalyptic number.

It is an amenable number.

52781881 is a deficient number, since it is larger than the sum of its proper divisors (1).

52781881 is an equidigital number, since it uses as much as digits as its factorization.

52781881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35840, while the sum is 40.

The square root of 52781881 is about 7265.1139702003. The cubic root of 52781881 is about 375.1125730176.

The spelling of 52781881 in words is "fifty-two million, seven hundred eighty-one thousand, eight hundred eighty-one".