51086851 has 4 divisors (see below), whose sum is σ = 51733600. Its totient is φ = 50440104.

The previous prime is 51086837. The next prime is 51086857. The reversal of 51086851 is 15868015.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51086851 - 2⁷ = 51086723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51086857) 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, 323256 + ... + 323413.

It is an arithmetic number, because the mean of its divisors is an integer number (12933400).

Almost surely, 2^51086851 is an apocalyptic number.

51086851 is a deficient number, since it is larger than the sum of its proper divisors (646749).

51086851 is an equidigital number, since it uses as much as digits as its factorization.

51086851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646748.

The product of its (nonzero) digits is 9600, while the sum is 34.

The square root of 51086851 is about 7147.5066281886. The cubic root of 51086851 is about 371.0533678915.

The spelling of 51086851 in words is "fifty-one million, eighty-six thousand, eight hundred fifty-one".