51389263 has 8 divisors (see below), whose sum is σ = 53449280. Its totient is φ = 49364640.

The previous prime is 51389251. The next prime is 51389293. The reversal of 51389263 is 36298315.

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 51389263 - 2⁵ = 51389231 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51389213) 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, 5868 + ... + 11713.

It is an arithmetic number, because the mean of its divisors is an integer number (6681160).

Almost surely, 2^51389263 is an apocalyptic number.

51389263 is a deficient number, since it is larger than the sum of its proper divisors (2060017).

51389263 is a wasteful number, since it uses less digits than its factorization.

51389263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17697.

The product of its digits is 38880, while the sum is 37.

The square root of 51389263 is about 7168.6304828747. The cubic root of 51389263 is about 371.7840862709.

The spelling of 51389263 in words is "fifty-one million, three hundred eighty-nine thousand, two hundred sixty-three".