51321163 has 8 divisors (see below), whose sum is σ = 51872240. Its totient is φ = 50772960.

The previous prime is 51321157. The next prime is 51321169. The reversal of 51321163 is 36112315.

It is a happy number.

51321163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51321157) and next prime (51321169).

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 51321163 - 2⁵ = 51321131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51321169) 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, 58081 + ... + 58957.

It is an arithmetic number, because the mean of its divisors is an integer number (6484030).

Almost surely, 2^51321163 is an apocalyptic number.

51321163 is a deficient number, since it is larger than the sum of its proper divisors (551077).

51321163 is a wasteful number, since it uses less digits than its factorization.

51321163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437.

The product of its digits is 540, while the sum is 22.

The square root of 51321163 is about 7163.8790469968. The cubic root of 51321163 is about 371.6197867857.

Adding to 51321163 its reverse (36112315), we get a palindrome (87433478).

The spelling of 51321163 in words is "fifty-one million, three hundred twenty-one thousand, one hundred sixty-three".