51812445 has 32 divisors (see below), whose sum is σ = 87091200. Its totient is φ = 26252864.

The previous prime is 51812437. The next prime is 51812459. The reversal of 51812445 is 54421815.

51812445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51812445 - 2³ = 51812437 is a prime.

It is a Curzon number.

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 31 ways as a sum of consecutive naturals, for example, 61336 + ... + 62174.

It is an arithmetic number, because the mean of its divisors is an integer number (2721600).

Almost surely, 2^51812445 is an apocalyptic number.

It is an amenable number.

51812445 is a deficient number, since it is larger than the sum of its proper divisors (35278755).

51812445 is a wasteful number, since it uses less digits than its factorization.

51812445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049.

The product of its digits is 6400, while the sum is 30.

The square root of 51812445 is about 7198.0862039851. The cubic root of 51812445 is about 372.8018243516.

It can be divided in two parts, 5181 and 2445, that added together give a triangular number (7626 = T₁₂₃).

The spelling of 51812445 in words is "fifty-one million, eight hundred twelve thousand, four hundred forty-five".