51364493 has 2 divisors, whose sum is σ = 51364494. Its totient is φ = 51364492.

The previous prime is 51364447. The next prime is 51364499. The reversal of 51364493 is 39446315.

It is a happy number.

51364493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50951044 + 413449 = 7138^2 + 643^2 .

It is a cyclic number.

It is not a de Polignac number, because 51364493 - 2⁸ = 51364237 is a prime.

It is a super-2 number, since 2×51364493² = 5276622282294098, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51364499) 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, 25682246 + 25682247.

It is an arithmetic number, because the mean of its divisors is an integer number (25682247).

Almost surely, 2^51364493 is an apocalyptic number.

It is an amenable number.

51364493 is a deficient number, since it is larger than the sum of its proper divisors (1).

51364493 is an equidigital number, since it uses as much as digits as its factorization.

51364493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 35.

The square root of 51364493 is about 7166.9026085192. The cubic root of 51364493 is about 371.7243424562.

The spelling of 51364493 in words is "fifty-one million, three hundred sixty-four thousand, four hundred ninety-three".