51426857 has 4 divisors (see below), whose sum is σ = 51616896. Its totient is φ = 51236820.

The previous prime is 51426847. The next prime is 51426871. The reversal of 51426857 is 75862415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51426857 - 2⁴ = 51426841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51426857.

It is not an unprimeable number, because it can be changed into a prime (51426847) 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 3 ways as a sum of consecutive naturals, for example, 94613 + ... + 95154.

It is an arithmetic number, because the mean of its divisors is an integer number (12904224).

Almost surely, 2^51426857 is an apocalyptic number.

It is an amenable number.

51426857 is a deficient number, since it is larger than the sum of its proper divisors (190039).

51426857 is a wasteful number, since it uses less digits than its factorization.

51426857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190038.

The product of its digits is 67200, while the sum is 38.

The square root of 51426857 is about 7171.2521221890. The cubic root of 51426857 is about 371.8747241671.

The spelling of 51426857 in words is "fifty-one million, four hundred twenty-six thousand, eight hundred fifty-seven".