49355821 has 4 divisors (see below), whose sum is σ = 49370112. Its totient is φ = 49341532.

The previous prime is 49355809. The next prime is 49355827. The reversal of 49355821 is 12855394.

49355821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49355821 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 (49355827) 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 3 ways as a sum of consecutive naturals, for example, 1620 + ... + 10066.

It is an arithmetic number, because the mean of its divisors is an integer number (12342528).

Almost surely, 2^49355821 is an apocalyptic number.

It is an amenable number.

49355821 is a deficient number, since it is larger than the sum of its proper divisors (14291).

49355821 is an equidigital number, since it uses as much as digits as its factorization.

49355821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14290.

The product of its digits is 43200, while the sum is 37.

The square root of 49355821 is about 7025.3698123302. The cubic root of 49355821 is about 366.8141892153.

It can be divided in two parts, 49355 and 821, that added together give a square (50176 = 224²).

The spelling of 49355821 in words is "forty-nine million, three hundred fifty-five thousand, eight hundred twenty-one".