51851804 has 6 divisors (see below), whose sum is σ = 90740664. Its totient is φ = 25925900.

The previous prime is 51851803. The next prime is 51851869. The reversal of 51851804 is 40815815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51851801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6481472 + ... + 6481479.

It is an arithmetic number, because the mean of its divisors is an integer number (15123444).

Almost surely, 2^51851804 is an apocalyptic number.

It is an amenable number.

51851804 is a deficient number, since it is larger than the sum of its proper divisors (38888860).

51851804 is a wasteful number, since it uses less digits than its factorization.

51851804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12962955 (or 12962953 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 51851804 is about 7200.8196755647. The cubic root of 51851804 is about 372.8961993171.

Adding to 51851804 its sum of digits (32), we get a triangular number (51851836 = T₁₀₁₈₃).

The spelling of 51851804 in words is "fifty-one million, eight hundred fifty-one thousand, eight hundred four".