51508678 has 16 divisors (see below), whose sum is σ = 83326320. Its totient is φ = 23738976.

The previous prime is 51508631. The next prime is 51508679. The reversal of 51508678 is 87680515.

It is a self number, because there is not a number n which added to its sum of digits gives 51508678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51508679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30028 + ... + 31696.

It is an arithmetic number, because the mean of its divisors is an integer number (5207895).

Almost surely, 2^51508678 is an apocalyptic number.

51508678 is a deficient number, since it is larger than the sum of its proper divisors (31817642).

51508678 is a wasteful number, since it uses less digits than its factorization.

51508678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 51508678 is about 7176.9546466451. The cubic root of 51508678 is about 372.0718393265.

The spelling of 51508678 in words is "fifty-one million, five hundred eight thousand, six hundred seventy-eight".