51486844 has 12 divisors (see below), whose sum is σ = 90606600. Its totient is φ = 25599248.

The previous prime is 51486817. The next prime is 51486859. The reversal of 51486844 is 44868415.

It is a junction number, because it is equal to n+sod(n) for n = 51486797 and 51486806.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 35239 + ... + 36670.

It is an arithmetic number, because the mean of its divisors is an integer number (7550550).

Almost surely, 2^51486844 is an apocalyptic number.

It is an amenable number.

51486844 is a deficient number, since it is larger than the sum of its proper divisors (39119756).

51486844 is a wasteful number, since it uses less digits than its factorization.

51486844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72092 (or 72090 counting only the distinct ones).

The product of its digits is 122880, while the sum is 40.

The square root of 51486844 is about 7175.4333667034. The cubic root of 51486844 is about 372.0192594183.

The spelling of 51486844 in words is "fifty-one million, four hundred eighty-six thousand, eight hundred forty-four".