51551678 has 8 divisors (see below), whose sum is σ = 79213680. Its totient is φ = 25147120.

The previous prime is 51551657. The next prime is 51551683. The reversal of 51551678 is 87615515.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314258 + ... + 314421.

It is an arithmetic number, because the mean of its divisors is an integer number (9901710).

Almost surely, 2^51551678 is an apocalyptic number.

51551678 is a deficient number, since it is larger than the sum of its proper divisors (27662002).

51551678 is a wasteful number, since it uses less digits than its factorization.

51551678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628722.

The product of its digits is 42000, while the sum is 38.

The square root of 51551678 is about 7179.9497212724. The cubic root of 51551678 is about 372.1753470570.

The spelling of 51551678 in words is "fifty-one million, five hundred fifty-one thousand, six hundred seventy-eight".