51257859 has 8 divisors (see below), whose sum is σ = 69112080. Its totient is φ = 33787776.

The previous prime is 51257851. The next prime is 51257863. The reversal of 51257859 is 95875215.

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

It is not a de Polignac number, because 51257859 - 2³ = 51257851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51257859.

It is not an unprimeable number, because it can be changed into a prime (51257851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95722 + ... + 96255.

It is an arithmetic number, because the mean of its divisors is an integer number (8639010).

Almost surely, 2^51257859 is an apocalyptic number.

51257859 is a deficient number, since it is larger than the sum of its proper divisors (17854221).

51257859 is a wasteful number, since it uses less digits than its factorization.

51257859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192069.

The product of its digits is 126000, while the sum is 42.

The square root of 51257859 is about 7159.4594069664. The cubic root of 51257859 is about 371.4669278295.

The spelling of 51257859 in words is "fifty-one million, two hundred fifty-seven thousand, eight hundred fifty-nine".