51538763 has 4 divisors (see below), whose sum is σ = 52795848. Its totient is φ = 50281680.

The previous prime is 51538741. The next prime is 51538777. The reversal of 51538763 is 36783515.

51538763 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51538763 - 2¹⁸ = 51276619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51538783) 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 3 ways as a sum of consecutive naturals, for example, 628481 + ... + 628562.

It is an arithmetic number, because the mean of its divisors is an integer number (13198962).

Almost surely, 2^51538763 is an apocalyptic number.

51538763 is a deficient number, since it is larger than the sum of its proper divisors (1257085).

51538763 is a wasteful number, since it uses less digits than its factorization.

51538763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257084.

The product of its digits is 75600, while the sum is 38.

The square root of 51538763 is about 7179.0502853790. The cubic root of 51538763 is about 372.1442646801.

The spelling of 51538763 in words is "fifty-one million, five hundred thirty-eight thousand, seven hundred sixty-three".