5381821 has 4 divisors (see below), whose sum is σ = 5395644. Its totient is φ = 5368000.

The previous prime is 5381819. The next prime is 5381861. The reversal of 5381821 is 1281835.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5225796 + 156025 = 2286^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 5381821 - 2¹ = 5381819 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5381821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5381861) 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, 6310 + ... + 7111.

It is an arithmetic number, because the mean of its divisors is an integer number (1348911).

Almost surely, 2^5381821 is an apocalyptic number.

It is an amenable number.

5381821 is a deficient number, since it is larger than the sum of its proper divisors (13823).

5381821 is a wasteful number, since it uses less digits than its factorization.

5381821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13822.

The product of its digits is 1920, while the sum is 28.

The square root of 5381821 is about 2319.8752121612. The cubic root of 5381821 is about 175.2439699242.

The spelling of 5381821 in words is "five million, three hundred eighty-one thousand, eight hundred twenty-one".