51198647 has 2 divisors, whose sum is σ = 51198648. Its totient is φ = 51198646.

The previous prime is 51198619. The next prime is 51198661. The reversal of 51198647 is 74689115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51198647 - 2¹⁶ = 51133111 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51198677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25599323 + 25599324.

It is an arithmetic number, because the mean of its divisors is an integer number (25599324).

Almost surely, 2^51198647 is an apocalyptic number.

51198647 is a deficient number, since it is larger than the sum of its proper divisors (1).

51198647 is an equidigital number, since it uses as much as digits as its factorization.

51198647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 41.

The square root of 51198647 is about 7155.3229836255. The cubic root of 51198647 is about 371.3238357906.

The spelling of 51198647 in words is "fifty-one million, one hundred ninety-eight thousand, six hundred forty-seven".