32051821 has 2 divisors, whose sum is σ = 32051822. Its totient is φ = 32051820.

The previous prime is 32051819. The next prime is 32051839. The reversal of 32051821 is 12815023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32046921 + 4900 = 5661^2 + 70^2 .

It is a cyclic number.

It is not a de Polignac number, because 32051821 - 2¹ = 32051819 is a prime.

Together with 32051819, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 32051792 and 32051801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32051881) 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, 16025910 + 16025911.

It is an arithmetic number, because the mean of its divisors is an integer number (16025911).

Almost surely, 2^32051821 is an apocalyptic number.

It is an amenable number.

32051821 is a deficient number, since it is larger than the sum of its proper divisors (1).

32051821 is an equidigital number, since it uses as much as digits as its factorization.

32051821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 32051821 is about 5661.4327691848. The cubic root of 32051821 is about 317.6514944464.

Adding to 32051821 its reverse (12815023), we get a palindrome (44866844).

The spelling of 32051821 in words is "thirty-two million, fifty-one thousand, eight hundred twenty-one".