51663305 has 8 divisors (see below), whose sum is σ = 62053512. Its totient is φ = 41292288.

The previous prime is 51663281. The next prime is 51663307. The reversal of 51663305 is 50336615.

It can be written as a sum of positive squares in 4 ways, for example, as 13520329 + 38142976 = 3677^2 + 6176^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51663305 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51663307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2009 + ... + 10361.

It is an arithmetic number, because the mean of its divisors is an integer number (7756689).

Almost surely, 2^51663305 is an apocalyptic number.

It is an amenable number.

51663305 is a deficient number, since it is larger than the sum of its proper divisors (10390207).

51663305 is a wasteful number, since it uses less digits than its factorization.

51663305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9595.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 51663305 is about 7187.7190401406. The cubic root of 51663305 is about 372.4437823363.

The spelling of 51663305 in words is "fifty-one million, six hundred sixty-three thousand, three hundred five".