51895986 has 8 divisors (see below), whose sum is σ = 103791984. Its totient is φ = 17298660.

The previous prime is 51895979. The next prime is 51895997. The reversal of 51895986 is 68959815.

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

51895986 is an admirable number.

It is a Curzon 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, 4324660 + ... + 4324671.

It is an arithmetic number, because the mean of its divisors is an integer number (12973998).

Almost surely, 2^51895986 is an apocalyptic number.

51895986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51895986 is a wasteful number, since it uses less digits than its factorization.

51895986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8649336.

The product of its digits is 777600, while the sum is 51.

The square root of 51895986 is about 7203.8868675181. The cubic root of 51895986 is about 373.0020819890.

It can be divided in two parts, 5189 and 5986, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 51895986 in words is "fifty-one million, eight hundred ninety-five thousand, nine hundred eighty-six".