51205201 has 2 divisors, whose sum is σ = 51205202. Its totient is φ = 51205200.

The previous prime is 51205183. The next prime is 51205223. The reversal of 51205201 is 10250215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48233025 + 2972176 = 6945^2 + 1724^2 .

It is a cyclic number.

It is not a de Polignac number, because 51205201 - 2⁷ = 51205073 is a prime.

It is not a weakly prime, because it can be changed into another prime (51205001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25602600 + 25602601.

It is an arithmetic number, because the mean of its divisors is an integer number (25602601).

Almost surely, 2^51205201 is an apocalyptic number.

It is an amenable number.

51205201 is a deficient number, since it is larger than the sum of its proper divisors (1).

51205201 is an equidigital number, since it uses as much as digits as its factorization.

51205201 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 51205201 is about 7155.7809496938. The cubic root of 51205201 is about 371.3396796506.

Adding to 51205201 its reverse (10250215), we get a palindrome (61455416).

The spelling of 51205201 in words is "fifty-one million, two hundred five thousand, two hundred one".