51008923 has 4 divisors (see below), whose sum is σ = 58295920. Its totient is φ = 43721928.

The previous prime is 51008899. The next prime is 51008927. The reversal of 51008923 is 32980015.

51008923 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 a de Polignac number, because none of the positive numbers 2^k-51008923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51008891 and 51008900.

It is not an unprimeable number, because it can be changed into a prime (51008927) 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, 3643488 + ... + 3643501.

It is an arithmetic number, because the mean of its divisors is an integer number (14573980).

Almost surely, 2^51008923 is an apocalyptic number.

51008923 is a deficient number, since it is larger than the sum of its proper divisors (7286997).

51008923 is an equidigital number, since it uses as much as digits as its factorization.

51008923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7286996.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 51008923 is about 7142.0531361787. The cubic root of 51008923 is about 370.8646033248.

Adding to 51008923 its reverse (32980015), we get a palindrome (83988938).

The spelling of 51008923 in words is "fifty-one million, eight thousand, nine hundred twenty-three".