51605063 has 2 divisors, whose sum is σ = 51605064. Its totient is φ = 51605062.

The previous prime is 51605039. The next prime is 51605131. The reversal of 51605063 is 36050615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51605063 - 2¹⁸ = 51342919 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51605003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25802531 + 25802532.

It is an arithmetic number, because the mean of its divisors is an integer number (25802532).

Almost surely, 2^51605063 is an apocalyptic number.

51605063 is a deficient number, since it is larger than the sum of its proper divisors (1).

51605063 is an equidigital number, since it uses as much as digits as its factorization.

51605063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 51605063 is about 7183.6664037245. Note that the first 3 decimals coincide. The cubic root of 51605063 is about 372.3037730509.

Adding to 51605063 its reverse (36050615), we get a palindrome (87655678).

The spelling of 51605063 in words is "fifty-one million, six hundred five thousand, sixty-three".