51139288 has 16 divisors (see below), whose sum is σ = 97042680. Its totient is φ = 25261248.

The previous prime is 51139261. The next prime is 51139301. The reversal of 51139288 is 88293115.

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, 37845 + ... + 39172.

Almost surely, 2^51139288 is an apocalyptic number.

It is an amenable number.

51139288 is a deficient number, since it is larger than the sum of its proper divisors (45903392).

51139288 is a wasteful number, since it uses less digits than its factorization.

51139288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77106 (or 77102 counting only the distinct ones).

The product of its digits is 17280, while the sum is 37.

The square root of 51139288 is about 7151.1738896492. The cubic root of 51139288 is about 371.1802777311.

The spelling of 51139288 in words is "fifty-one million, one hundred thirty-nine thousand, two hundred eighty-eight".