51387708 has 24 divisors (see below), whose sum is σ = 123773440. Its totient is φ = 16576560.

The previous prime is 51387703. The next prime is 51387731. The reversal of 51387708 is 80778315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51387701) 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 7 ways as a sum of consecutive naturals, for example, 68698 + ... + 69441.

Almost surely, 2^51387708 is an apocalyptic number.

It is an amenable number.

51387708 is an abundant number, since it is smaller than the sum of its proper divisors (72385732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51387708 is a wasteful number, since it uses less digits than its factorization.

51387708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138177 (or 138175 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 51387708 is about 7168.5220234020. The cubic root of 51387708 is about 371.7803362653.

The spelling of 51387708 in words is "fifty-one million, three hundred eighty-seven thousand, seven hundred eight".