51851836 has 48 divisors (see below), whose sum is σ = 102816000. Its totient is φ = 22733568.

The previous prime is 51851803. The next prime is 51851869. The reversal of 51851836 is 63815815.

51851836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

51851836 is a nontrivial binomial coefficient, being equal to C(10184, 2).

It is an interprime number because it is at equal distance from previous prime (51851803) and next prime (51851869).

It is a super-2 number, since 2×51851836² = 5377225793141792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51851795 and 51851804.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 86265 + ... + 86863.

It is an arithmetic number, because the mean of its divisors is an integer number (2142000).

Almost surely, 2^51851836 is an apocalyptic number.

51851836 is the 10183-rd triangular number and also the 5092-nd hexagonal number.

51851836 is the 3395-th centered nonagonal number.

It is an amenable number.

51851836 is a deficient number, since it is larger than the sum of its proper divisors (50964164).

51851836 is a wasteful number, since it uses less digits than its factorization.

51851836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706 (or 704 counting only the distinct ones).

The product of its digits is 28800, while the sum is 37.

The square root of 51851836 is about 7200.8218975336. The cubic root of 51851836 is about 372.8962760272.

It can be divided in two parts, 5185 and 1836, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 51851836 in words is "fifty-one million, eight hundred fifty-one thousand, eight hundred thirty-six".