51320201 has 2 divisors, whose sum is σ = 51320202. Its totient is φ = 51320200.

The previous prime is 51320189. The next prime is 51320207. The reversal of 51320201 is 10202315.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48511225 + 2808976 = 6965^2 + 1676^2 .

It is a cyclic number.

It is not a de Polignac number, because 51320201 - 2¹⁴ = 51303817 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51320207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25660100 + 25660101.

It is an arithmetic number, because the mean of its divisors is an integer number (25660101).

Almost surely, 2^51320201 is an apocalyptic number.

It is an amenable number.

51320201 is a deficient number, since it is larger than the sum of its proper divisors (1).

51320201 is an equidigital number, since it uses as much as digits as its factorization.

51320201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 51320201 is about 7163.8119042867. The cubic root of 51320201 is about 371.6174648036.

Adding to 51320201 its reverse (10202315), we get a palindrome (61522516).

The spelling of 51320201 in words is "fifty-one million, three hundred twenty thousand, two hundred one".