51251486 has 32 divisors (see below), whose sum is σ = 91125216. Its totient is φ = 21489600.

The previous prime is 51251467. The next prime is 51251491. The reversal of 51251486 is 68415215.

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 15 ways as a sum of consecutive naturals, for example, 33866 + ... + 35346.

It is an arithmetic number, because the mean of its divisors is an integer number (2847663).

Almost surely, 2^51251486 is an apocalyptic number.

51251486 is a deficient number, since it is larger than the sum of its proper divisors (39873730).

51251486 is a wasteful number, since it uses less digits than its factorization.

51251486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529 (or 1507 counting only the distinct ones).

The product of its digits is 9600, while the sum is 32.

The square root of 51251486 is about 7159.0143176278. The cubic root of 51251486 is about 371.4515320971.

The spelling of 51251486 in words is "fifty-one million, two hundred fifty-one thousand, four hundred eighty-six".