51497863 has 2 divisors, whose sum is σ = 51497864. Its totient is φ = 51497862.

The previous prime is 51497861. The next prime is 51497867. The reversal of 51497863 is 36879415.

51497863 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 is a cyclic number.

It is not a de Polignac number, because 51497863 - 2¹ = 51497861 is a prime.

Together with 51497861, 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 (51497861) 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, 25748931 + 25748932.

It is an arithmetic number, because the mean of its divisors is an integer number (25748932).

Almost surely, 2^51497863 is an apocalyptic number.

51497863 is a deficient number, since it is larger than the sum of its proper divisors (1).

51497863 is an equidigital number, since it uses as much as digits as its factorization.

51497863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 51497863 is about 7176.2011538139. The cubic root of 51497863 is about 372.0457968630.

The spelling of 51497863 in words is "fifty-one million, four hundred ninety-seven thousand, eight hundred sixty-three".