51971859 has 24 divisors (see below), whose sum is σ = 79310400. Its totient is φ = 32704560.

The previous prime is 51971851. The next prime is 51971863. The reversal of 51971859 is 95817915.

It is not a de Polignac number, because 51971859 - 2³ = 51971851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51971851) 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 23 ways as a sum of consecutive naturals, for example, 83652 + ... + 84270.

It is an arithmetic number, because the mean of its divisors is an integer number (3304600).

Almost surely, 2^51971859 is an apocalyptic number.

51971859 is a deficient number, since it is larger than the sum of its proper divisors (27338541).

51971859 is a wasteful number, since it uses less digits than its factorization.

51971859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135 (or 1132 counting only the distinct ones).

The product of its digits is 113400, while the sum is 45.

The square root of 51971859 is about 7209.1510595909. The cubic root of 51971859 is about 373.1837723806.

It can be divided in two parts, 5197 and 1859, that added together give a square (7056 = 84²).

The spelling of 51971859 in words is "fifty-one million, nine hundred seventy-one thousand, eight hundred fifty-nine".