51818359 has 2 divisors, whose sum is σ = 51818360. Its totient is φ = 51818358.

The previous prime is 51818357. The next prime is 51818369. The reversal of 51818359 is 95381815.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51818359 - 2¹ = 51818357 is a prime.

Together with 51818357, 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 (51818357) 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, 25909179 + 25909180.

It is an arithmetic number, because the mean of its divisors is an integer number (25909180).

Almost surely, 2^51818359 is an apocalyptic number.

51818359 is a deficient number, since it is larger than the sum of its proper divisors (1).

51818359 is an equidigital number, since it uses as much as digits as its factorization.

51818359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 40.

The square root of 51818359 is about 7198.4969959013. The cubic root of 51818359 is about 372.8160079846.

The spelling of 51818359 in words is "fifty-one million, eight hundred eighteen thousand, three hundred fifty-nine".