51326413 has 2 divisors, whose sum is σ = 51326414. Its totient is φ = 51326412.

The previous prime is 51326411. The next prime is 51326449. The reversal of 51326413 is 31462315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43917129 + 7409284 = 6627^2 + 2722^2 .

It is a cyclic number.

It is not a de Polignac number, because 51326413 - 2¹ = 51326411 is a prime.

Together with 51326411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51326411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25663206 + 25663207.

It is an arithmetic number, because the mean of its divisors is an integer number (25663207).

Almost surely, 2^51326413 is an apocalyptic number.

It is an amenable number.

51326413 is a deficient number, since it is larger than the sum of its proper divisors (1).

51326413 is an equidigital number, since it uses as much as digits as its factorization.

51326413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 25.

The square root of 51326413 is about 7164.2454592232. The cubic root of 51326413 is about 371.6324582143.

Adding to 51326413 its reverse (31462315), we get a palindrome (82788728).

The spelling of 51326413 in words is "fifty-one million, three hundred twenty-six thousand, four hundred thirteen".