49851 has 12 divisors (see below), whose sum is σ = 74880. Its totient is φ = 31920.

The previous prime is 49843. The next prime is 49853. The reversal of 49851 is 15894.

It is not a de Polignac number, because 49851 - 2³ = 49843 is a prime.

It is a plaindrome in base 11.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (49853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166 + ... + 356.

It is an arithmetic number, because the mean of its divisors is an integer number (6240).

2⁴⁹⁸⁵¹ is an apocalyptic number.

49851 is a deficient number, since it is larger than the sum of its proper divisors (25029).

49851 is a wasteful number, since it uses less digits than its factorization.

49851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 223 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 49851 is about 223.2733750361. The cubic root of 49851 is about 36.8036838625.

It can be divided in two parts, 49 and 851, that added together give a square (900 = 30²).

The spelling of 49851 in words is "forty-nine thousand, eight hundred fifty-one".