51347857 has 8 divisors (see below), whose sum is σ = 56232000. Its totient is φ = 46499760.

The previous prime is 51347833. The next prime is 51347887. The reversal of 51347857 is 75874315.

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 51347857 - 2²³ = 42959249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51347827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5982 + ... + 11767.

It is an arithmetic number, because the mean of its divisors is an integer number (7029000).

Almost surely, 2^51347857 is an apocalyptic number.

It is an amenable number.

51347857 is a deficient number, since it is larger than the sum of its proper divisors (4884143).

51347857 is a wasteful number, since it uses less digits than its factorization.

51347857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18023.

The product of its digits is 117600, while the sum is 40.

The square root of 51347857 is about 7165.7419015759. The cubic root of 51347857 is about 371.6842065987.

The spelling of 51347857 in words is "fifty-one million, three hundred forty-seven thousand, eight hundred fifty-seven".