49805821 has 12 divisors (see below), whose sum is σ = 56773920. Its totient is φ = 43552080.

The previous prime is 49805803. The next prime is 49805831. The reversal of 49805821 is 12850894.

It is not a de Polignac number, because 49805821 - 2²¹ = 47708669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49805831) 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, 4545 + ... + 10966.

It is an arithmetic number, because the mean of its divisors is an integer number (4731160).

Almost surely, 2^49805821 is an apocalyptic number.

It is an amenable number.

49805821 is a deficient number, since it is larger than the sum of its proper divisors (6968099).

49805821 is a wasteful number, since it uses less digits than its factorization.

49805821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15556 (or 15543 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 49805821 is about 7057.3239262485. The cubic root of 49805821 is about 367.9256234573.

It can be divided in two parts, 4980 and 5821, that added together give a palindrome (10801).

The spelling of 49805821 in words is "forty-nine million, eight hundred five thousand, eight hundred twenty-one".