51663753 has 6 divisors (see below), whose sum is σ = 74625434. Its totient is φ = 34442496.

The previous prime is 51663751. The next prime is 51663791. The reversal of 51663753 is 35736615.

It is a happy number.

51663753 is a `hidden beast` number, since 5 + 16 + 637 + 5 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 31843449 + 19820304 = 5643^2 + 4452^2 .

It is not a de Polignac number, because 51663753 - 2¹ = 51663751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51663751) 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 5 ways as a sum of consecutive naturals, for example, 2870200 + ... + 2870217.

Almost surely, 2^51663753 is an apocalyptic number.

It is an amenable number.

51663753 is a deficient number, since it is larger than the sum of its proper divisors (22961681).

51663753 is a wasteful number, since it uses less digits than its factorization.

51663753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5740423 (or 5740420 counting only the distinct ones).

The product of its digits is 56700, while the sum is 36.

The square root of 51663753 is about 7187.7502043407. The cubic root of 51663753 is about 372.4448588859. Note that the first 3 decimals are identical.

The spelling of 51663753 in words is "fifty-one million, six hundred sixty-three thousand, seven hundred fifty-three".