51872805 has 40 divisors (see below), whose sum is σ = 93532032. Its totient is φ = 27503712.

The previous prime is 51872789. The next prime is 51872809. The reversal of 51872805 is 50827815.

It is not a de Polignac number, because 51872805 - 2⁴ = 51872789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51872805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51872809) 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 39 ways as a sum of consecutive naturals, for example, 106272 + ... + 106758.

Almost surely, 2^51872805 is an apocalyptic number.

It is an amenable number.

51872805 is a deficient number, since it is larger than the sum of its proper divisors (41659227).

51872805 is a wasteful number, since it uses less digits than its factorization.

51872805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767 (or 758 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 51872805 is about 7202.2777647075. The cubic root of 51872805 is about 372.9465359525.

The spelling of 51872805 in words is "fifty-one million, eight hundred seventy-two thousand, eight hundred five".