51488686 has 8 divisors (see below), whose sum is σ = 77554224. Its totient is φ = 25637280.

The previous prime is 51488683. The next prime is 51488707. The reversal of 51488686 is 68688415.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51488681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52930 + ... + 53893.

It is an arithmetic number, because the mean of its divisors is an integer number (9694278).

Almost surely, 2^51488686 is an apocalyptic number.

51488686 is a deficient number, since it is larger than the sum of its proper divisors (26065538).

51488686 is a wasteful number, since it uses less digits than its factorization.

51488686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107066.

The product of its digits is 368640, while the sum is 46.

The square root of 51488686 is about 7175.5617201722. The cubic root of 51488686 is about 372.0236958352.

The spelling of 51488686 in words is "fifty-one million, four hundred eighty-eight thousand, six hundred eighty-six".