45802021 has 2 divisors, whose sum is σ = 45802022. Its totient is φ = 45802020.

The previous prime is 45801997. The next prime is 45802051. The reversal of 45802021 is 12020854.

45802021 = 4785² + 4786².

45802021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22905796 + 22896225 = 4786^2 + 4785^2 .

It is a cyclic number.

It is not a de Polignac number, because 45802021 - 2¹¹ = 45799973 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 45801983 and 45802001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45802051) 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, 22901010 + 22901011.

It is an arithmetic number, because the mean of its divisors is an integer number (22901011).

Almost surely, 2^45802021 is an apocalyptic number.

45802021 is the 4786-th centered square number.

It is an amenable number.

45802021 is a deficient number, since it is larger than the sum of its proper divisors (1).

45802021 is an equidigital number, since it uses as much as digits as its factorization.

45802021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 45802021 is about 6767.7190396765. The cubic root of 45802021 is about 357.7900129305.

Adding to 45802021 its reverse (12020854), we get a palindrome (57822875).

The spelling of 45802021 in words is "forty-five million, eight hundred two thousand, twenty-one".