49816021 has 2 divisors, whose sum is σ = 49816022. Its totient is φ = 49816020.

The previous prime is 49816009. The next prime is 49816027. The reversal of 49816021 is 12061894.

It is a happy number.

49816021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34644996 + 15171025 = 5886^2 + 3895^2 .

It is a cyclic number.

It is not a de Polignac number, because 49816021 - 2⁷ = 49815893 is a prime.

It is equal to p_2990740 and since 49816021 and 2990740 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49816027) 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 as a sum of consecutive naturals, namely, 24908010 + 24908011.

It is an arithmetic number, because the mean of its divisors is an integer number (24908011).

Almost surely, 2^49816021 is an apocalyptic number.

It is an amenable number.

49816021 is a deficient number, since it is larger than the sum of its proper divisors (1).

49816021 is an equidigital number, since it uses as much as digits as its factorization.

49816021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 49816021 is about 7058.0465427765. The cubic root of 49816021 is about 367.9507382271.

The spelling of 49816021 in words is "forty-nine million, eight hundred sixteen thousand, twenty-one".