51365663 has 2 divisors, whose sum is σ = 51365664. Its totient is φ = 51365662.

The previous prime is 51365659. The next prime is 51365707. The reversal of 51365663 is 36656315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51365663 - 2² = 51365659 is a prime.

It is a Sophie Germain prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51368663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25682831 + 25682832.

It is an arithmetic number, because the mean of its divisors is an integer number (25682832).

Almost surely, 2^51365663 is an apocalyptic number.

51365663 is a deficient number, since it is larger than the sum of its proper divisors (1).

51365663 is an equidigital number, since it uses as much as digits as its factorization.

51365663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 35.

The square root of 51365663 is about 7166.9842332741. The cubic root of 51365663 is about 371.7271648610.

The spelling of 51365663 in words is "fifty-one million, three hundred sixty-five thousand, six hundred sixty-three".