51859243 has 4 divisors (see below), whose sum is σ = 51913840. Its totient is φ = 51804648.

The previous prime is 51859193. The next prime is 51859253. The reversal of 51859243 is 34295815.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51859243 - 2²¹ = 49762091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51859253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25848 + ... + 27781.

It is an arithmetic number, because the mean of its divisors is an integer number (12978460).

Almost surely, 2^51859243 is an apocalyptic number.

51859243 is a deficient number, since it is larger than the sum of its proper divisors (54597).

51859243 is an equidigital number, since it uses as much as digits as its factorization.

51859243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54596.

The product of its digits is 43200, while the sum is 37.

The square root of 51859243 is about 7201.3361954571. The cubic root of 51859243 is about 372.9140311761.

The spelling of 51859243 in words is "fifty-one million, eight hundred fifty-nine thousand, two hundred forty-three".