51375197 has 2 divisors, whose sum is σ = 51375198. Its totient is φ = 51375196.

The previous prime is 51375157. The next prime is 51375199. The reversal of 51375197 is 79157315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34351321 + 17023876 = 5861^2 + 4126^2 .

It is a cyclic number.

It is not a de Polignac number, because 51375197 - 2⁸ = 51374941 is a prime.

Together with 51375199, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51375197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51375199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25687598 + 25687599.

It is an arithmetic number, because the mean of its divisors is an integer number (25687599).

Almost surely, 2^51375197 is an apocalyptic number.

It is an amenable number.

51375197 is a deficient number, since it is larger than the sum of its proper divisors (1).

51375197 is an equidigital number, since it uses as much as digits as its factorization.

51375197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33075, while the sum is 38.

The square root of 51375197 is about 7167.6493357306. The cubic root of 51375197 is about 371.7501622444.

The spelling of 51375197 in words is "fifty-one million, three hundred seventy-five thousand, one hundred ninety-seven".