51438263 has 8 divisors (see below), whose sum is σ = 54462000. Its totient is φ = 48446208.

The previous prime is 51438229. The next prime is 51438271. The reversal of 51438263 is 36283415.

51438263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 51438263 - 2⁸ = 51438007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51438203) 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 7 ways as a sum of consecutive naturals, for example, 4538 + ... + 11111.

It is an arithmetic number, because the mean of its divisors is an integer number (6807750).

Almost surely, 2^51438263 is an apocalyptic number.

51438263 is a deficient number, since it is larger than the sum of its proper divisors (3023737).

51438263 is a wasteful number, since it uses less digits than its factorization.

51438263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15841.

The product of its digits is 17280, while the sum is 32.

The square root of 51438263 is about 7172.0473367094. The cubic root of 51438263 is about 371.9022149233.

The spelling of 51438263 in words is "fifty-one million, four hundred thirty-eight thousand, two hundred sixty-three".