51427213 has 2 divisors, whose sum is σ = 51427214. Its totient is φ = 51427212.

The previous prime is 51427199. The next prime is 51427247. The reversal of 51427213 is 31272415.

It is a happy number.

51427213 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., 50509449 + 917764 = 7107^2 + 958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51427213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51427273) 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, 25713606 + 25713607.

It is an arithmetic number, because the mean of its divisors is an integer number (25713607).

Almost surely, 2^51427213 is an apocalyptic number.

It is an amenable number.

51427213 is a deficient number, since it is larger than the sum of its proper divisors (1).

51427213 is an equidigital number, since it uses as much as digits as its factorization.

51427213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 25.

The square root of 51427213 is about 7171.2769434739. The cubic root of 51427213 is about 371.8755822602.

Adding to 51427213 its reverse (31272415), we get a palindrome (82699628).

The spelling of 51427213 in words is "fifty-one million, four hundred twenty-seven thousand, two hundred thirteen".