51689548 has 12 divisors (see below), whose sum is σ = 91696360. Its totient is φ = 25490592.

The previous prime is 51689531. The next prime is 51689549. The reversal of 51689548 is 84598615.

It is a junction number, because it is equal to n+sod(n) for n = 51689498 and 51689507.

It is not an unprimeable number, because it can be changed into a prime (51689549) 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 3 ways as a sum of consecutive naturals, for example, 88218 + ... + 88801.

Almost surely, 2^51689548 is an apocalyptic number.

It is an amenable number.

51689548 is a deficient number, since it is larger than the sum of its proper divisors (40006812).

51689548 is a wasteful number, since it uses less digits than its factorization.

51689548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177096 (or 177094 counting only the distinct ones).

The product of its digits is 345600, while the sum is 46.

The square root of 51689548 is about 7189.5443527389. The cubic root of 51689548 is about 372.5068341013.

The spelling of 51689548 in words is "fifty-one million, six hundred eighty-nine thousand, five hundred forty-eight".