51086399 has 8 divisors (see below), whose sum is σ = 62875680. Its totient is φ = 40419936.

The previous prime is 51086363. The next prime is 51086407. The reversal of 51086399 is 99368015.

51086399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 51086399 - 2⁸ = 51086143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51086599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280604 + ... + 280785.

It is an arithmetic number, because the mean of its divisors is an integer number (7859460).

Almost surely, 2^51086399 is an apocalyptic number.

51086399 is a deficient number, since it is larger than the sum of its proper divisors (11789281).

51086399 is a wasteful number, since it uses less digits than its factorization.

51086399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561409.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 51086399 is about 7147.4750087006. The cubic root of 51086399 is about 371.0522735681.

The spelling of 51086399 in words is "fifty-one million, eighty-six thousand, three hundred ninety-nine".