51851163 has 48 divisors (see below), whose sum is σ = 88763136. Its totient is φ = 26671680.

The previous prime is 51851153. The next prime is 51851167. The reversal of 51851163 is 36115815.

It is not a de Polignac number, because 51851163 - 2⁹ = 51850651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51851163.

It is not an unprimeable number, because it can be changed into a prime (51851167) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81858 + ... + 82488.

It is an arithmetic number, because the mean of its divisors is an integer number (1849232).

Almost surely, 2^51851163 is an apocalyptic number.

51851163 is a deficient number, since it is larger than the sum of its proper divisors (36911973).

51851163 is a wasteful number, since it uses less digits than its factorization.

51851163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704 (or 697 counting only the distinct ones).

The product of its digits is 3600, while the sum is 30.

The square root of 51851163 is about 7200.7751666053. The cubic root of 51851163 is about 372.8946627106.

Adding to 51851163 its reverse (36115815), we get a palindrome (87966978).

It can be divided in two parts, 518 and 51163, that added together give a triangular number (51681 = T₃₂₁).

The spelling of 51851163 in words is "fifty-one million, eight hundred fifty-one thousand, one hundred sixty-three".