51497867 has 2 divisors, whose sum is σ = 51497868. Its totient is φ = 51497866.

The previous prime is 51497863. The next prime is 51497869. The reversal of 51497867 is 76879415.

51497867 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 is a cyclic number.

It is not a de Polignac number, because 51497867 - 2² = 51497863 is a prime.

Together with 51497869, it forms a pair of twin primes.

It is a Chen prime.

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, 25748933 + 25748934.

It is an arithmetic number, because the mean of its divisors is an integer number (25748934).

Almost surely, 2^51497867 is an apocalyptic number.

51497867 is a deficient number, since it is larger than the sum of its proper divisors (1).

51497867 is an equidigital number, since it uses as much as digits as its factorization.

51497867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 47.

The square root of 51497867 is about 7176.2014325129. The cubic root of 51497867 is about 372.0458064956.

The spelling of 51497867 in words is "fifty-one million, four hundred ninety-seven thousand, eight hundred sixty-seven".