51052021 has 2 divisors, whose sum is σ = 51052022. Its totient is φ = 51052020.

The previous prime is 51052013. The next prime is 51052061. The reversal of 51052021 is 12025015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29008996 + 22043025 = 5386^2 + 4695^2 .

It is a cyclic number.

It is not a de Polignac number, because 51052021 - 2³ = 51052013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51051986 and 51052004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51052061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25526010 + 25526011.

It is an arithmetic number, because the mean of its divisors is an integer number (25526011).

Almost surely, 2^51052021 is an apocalyptic number.

It is an amenable number.

51052021 is a deficient number, since it is larger than the sum of its proper divisors (1).

51052021 is an equidigital number, since it uses as much as digits as its factorization.

51052021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 51052021 is about 7145.0696987503. The cubic root of 51052021 is about 370.9690231158.

Adding to 51052021 its reverse (12025015), we get a palindrome (63077036).

The spelling of 51052021 in words is "fifty-one million, fifty-two thousand, twenty-one".