549851 has 4 divisors (see below), whose sum is σ = 563304. Its totient is φ = 536400.

The previous prime is 549839. The next prime is 549863. The reversal of 549851 is 158945.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (549839) and next prime (549863).

It is a cyclic number.

It is not a de Polignac number, because 549851 - 2¹⁰ = 548827 is a prime.

It is a super-2 number, since 2×549851² = 604672244402, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 549851.

It is not an unprimeable number, because it can be changed into a prime (549551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6665 + ... + 6746.

It is an arithmetic number, because the mean of its divisors is an integer number (140826).

2⁵⁴⁹⁸⁵¹ is an apocalyptic number.

549851 is a deficient number, since it is larger than the sum of its proper divisors (13453).

549851 is a wasteful number, since it uses less digits than its factorization.

549851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13452.

The product of its digits is 7200, while the sum is 32.

The square root of 549851 is about 741.5193861255. The cubic root of 549851 is about 81.9247276725.

The spelling of 549851 in words is "five hundred forty-nine thousand, eight hundred fifty-one".