51840123 has 16 divisors (see below), whose sum is σ = 73366560. Its totient is φ = 32446976.

The previous prime is 51840121. The next prime is 51840127. The reversal of 51840123 is 32104815.

51840123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51840123 - 2¹ = 51840121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51840093 and 51840102.

It is not an unprimeable number, because it can be changed into a prime (51840121) 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 15 ways as a sum of consecutive naturals, for example, 24961 + ... + 26957.

It is an arithmetic number, because the mean of its divisors is an integer number (4585410).

Almost surely, 2^51840123 is an apocalyptic number.

51840123 is a deficient number, since it is larger than the sum of its proper divisors (21526437).

51840123 is a wasteful number, since it uses less digits than its factorization.

51840123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 51840123 is about 7200.0085416616. The cubic root of 51840123 is about 372.8681956136.

Adding to 51840123 its reverse (32104815), we get a palindrome (83944938).

The spelling of 51840123 in words is "fifty-one million, eight hundred forty thousand, one hundred twenty-three".