549826381 has 8 divisors (see below), whose sum is σ = 593291160. Its totient is φ = 506528832.

The previous prime is 549826379. The next prime is 549826429. The reversal of 549826381 is 183628945.

549826381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 60310756 + 489515625 = 7766^2 + 22125^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 549826381 - 2¹ = 549826379 is a prime.

It is a super-2 number, since 2×549826381² = 604618098487114322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549826301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34930 + ... + 48163.

It is an arithmetic number, because the mean of its divisors is an integer number (74161395).

Almost surely, 2^549826381 is an apocalyptic number.

It is an amenable number.

549826381 is a deficient number, since it is larger than the sum of its proper divisors (43464779).

549826381 is a wasteful number, since it uses less digits than its factorization.

549826381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83615.

The product of its digits is 414720, while the sum is 46.

The square root of 549826381 is about 23448.3769374343. The cubic root of 549826381 is about 819.2350495641.

The spelling of 549826381 in words is "five hundred forty-nine million, eight hundred twenty-six thousand, three hundred eighty-one".