51303191 has 2 divisors, whose sum is σ = 51303192. Its totient is φ = 51303190.

The previous prime is 51303169. The next prime is 51303199. The reversal of 51303191 is 19130315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51303191 - 2¹⁸ = 51041047 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 (51303199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25651595 + 25651596.

It is an arithmetic number, because the mean of its divisors is an integer number (25651596).

Almost surely, 2^51303191 is an apocalyptic number.

51303191 is a deficient number, since it is larger than the sum of its proper divisors (1).

51303191 is an equidigital number, since it uses as much as digits as its factorization.

51303191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 405, while the sum is 23.

The square root of 51303191 is about 7162.6245887943. The cubic root of 51303191 is about 371.5764029250.

The spelling of 51303191 in words is "fifty-one million, three hundred three thousand, one hundred ninety-one".