51216301 has 2 divisors, whose sum is σ = 51216302. Its totient is φ = 51216300.

The previous prime is 51216293. The next prime is 51216313. The reversal of 51216301 is 10361215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50424201 + 792100 = 7101^2 + 890^2 .

It is a cyclic number.

It is not a de Polignac number, because 51216301 - 2³ = 51216293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51216401) 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, 25608150 + 25608151.

It is an arithmetic number, because the mean of its divisors is an integer number (25608151).

Almost surely, 2^51216301 is an apocalyptic number.

It is an amenable number.

51216301 is a deficient number, since it is larger than the sum of its proper divisors (1).

51216301 is an equidigital number, since it uses as much as digits as its factorization.

51216301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 51216301 is about 7156.5565043532. The cubic root of 51216301 is about 371.3665100803.

Adding to 51216301 its reverse (10361215), we get a palindrome (61577516).

The spelling of 51216301 in words is "fifty-one million, two hundred sixteen thousand, three hundred one".