51636330 has 24 divisors (see below), whose sum is σ = 134254692. Its totient is φ = 13769664.

The previous prime is 51636329. The next prime is 51636337. The reversal of 51636330 is 3363615.

51636330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 51279921 + 356409 = 7161^2 + 597^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51636294 and 51636303.

It is not an unprimeable number, because it can be changed into a prime (51636337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 286779 + ... + 286958.

Almost surely, 2^51636330 is an apocalyptic number.

51636330 is an abundant number, since it is smaller than the sum of its proper divisors (82618362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51636330 is a wasteful number, since it uses less digits than its factorization.

51636330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573750 (or 573747 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 27.

The square root of 51636330 is about 7185.8423305831. The cubic root of 51636330 is about 372.3789496012.

Adding to 51636330 its reverse (3363615), we get a palindrome (54999945).

The spelling of 51636330 in words is "fifty-one million, six hundred thirty-six thousand, three hundred thirty".