548355881 has 2 divisors, whose sum is σ = 548355882. Its totient is φ = 548355880.

The previous prime is 548355839. The next prime is 548355883. The reversal of 548355881 is 188553845.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 438525481 + 109830400 = 20941^2 + 10480^2 .

It is a cyclic number.

It is not a de Polignac number, because 548355881 - 2¹⁰ = 548354857 is a prime.

It is a super-2 number, since 2×548355881² = 601388344454572322, which contains 22 as substring.

Together with 548355883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (548355883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274177940 + 274177941.

It is an arithmetic number, because the mean of its divisors is an integer number (274177941).

Almost surely, 2^548355881 is an apocalyptic number.

It is an amenable number.

548355881 is a deficient number, since it is larger than the sum of its proper divisors (1).

548355881 is an equidigital number, since it uses as much as digits as its factorization.

548355881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768000, while the sum is 47.

The square root of 548355881 is about 23416.9998291839. Note that the first 3 decimals coincide. The cubic root of 548355881 is about 818.5040547448.

The spelling of 548355881 in words is "five hundred forty-eight million, three hundred fifty-five thousand, eight hundred eighty-one".