547981281 has 45 divisors (see below), whose sum is σ = 873300181. Its totient is φ = 343831392.

The previous prime is 547981249. The next prime is 547981309. The reversal of 547981281 is 182189745.

The square root of 547981281 is 23409.

It is a perfect power (a square, a biquadrate), and thus also a powerful number.

547981281 is a `hidden beast` number, since 547 + 9 + 81 + 28 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 170067681 + 377913600 = 13041^2 + 19440^2 .

It is not a de Polignac number, because 547981281 - 2⁵ = 547981249 is a prime.

It is a super-2 number, since 2×547981281² = 600566968652801922, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (161280) is a multiple of the sum of its prime divisors (20).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (547981081) 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 in 44 ways as a sum of consecutive naturals, for example, 32234185 + ... + 32234201.

Almost surely, 2^547981281 is an apocalyptic number.

547981281 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

547981281 is the 23409-th square number.

547981281 is the 11705-th centered octagonal number.

It is an amenable number.

547981281 is a deficient number, since it is larger than the sum of its proper divisors (325318900).

547981281 is an frugal number, since it uses more digits than its factorization.

547981281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 20 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The cubic root of 547981281 is about 818.3176299096.

The spelling of 547981281 in words is "five hundred forty-seven million, nine hundred eighty-one thousand, two hundred eighty-one".