51700123 has 4 divisors (see below), whose sum is σ = 52547728. Its totient is φ = 50852520.

The previous prime is 51700109. The next prime is 51700163. The reversal of 51700123 is 32100715.

51700123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51700123 - 2⁵ = 51700091 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 51700123.

It is not an unprimeable number, because it can be changed into a prime (51700163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423711 + ... + 423832.

It is an arithmetic number, because the mean of its divisors is an integer number (13136932).

Almost surely, 2^51700123 is an apocalyptic number.

51700123 is a deficient number, since it is larger than the sum of its proper divisors (847605).

51700123 is an equidigital number, since it uses as much as digits as its factorization.

51700123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847604.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 51700123 is about 7190.2797581179. The cubic root of 51700123 is about 372.5322356980.

Adding to 51700123 its reverse (32100715), we get a palindrome (83800838).

The spelling of 51700123 in words is "fifty-one million, seven hundred thousand, one hundred twenty-three".