49851681 has 16 divisors (see below), whose sum is σ = 73234368. Its totient is φ = 29912000.

The previous prime is 49851661. The next prime is 49851713. The reversal of 49851681 is 18615894.

49851681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 49851681 - 2⁹ = 49851169 is a prime.

It is a super-2 number, since 2×49851681² = 4970380197051522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (49851601) 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 15 ways as a sum of consecutive naturals, for example, 4146 + ... + 10811.

It is an arithmetic number, because the mean of its divisors is an integer number (4577148).

Almost surely, 2^49851681 is an apocalyptic number.

It is an amenable number.

49851681 is a deficient number, since it is larger than the sum of its proper divisors (23382687).

49851681 is a wasteful number, since it uses less digits than its factorization.

49851681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15072.

The product of its digits is 69120, while the sum is 42.

The square root of 49851681 is about 7060.5722855871. The cubic root of 49851681 is about 368.0385144984.

It can be divided in two parts, 4985 and 1681, that added together give a palindrome (6666).

The spelling of 49851681 in words is "forty-nine million, eight hundred fifty-one thousand, six hundred eighty-one".