51465839 has 6 divisors (see below), whose sum is σ = 51879000. Its totient is φ = 51055940.

The previous prime is 51465833. The next prime is 51465847. The reversal of 51465839 is 93856415.

It is not a de Polignac number, because 51465839 - 2¹⁶ = 51400303 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51465796 and 51465805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51465833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15662 + ... + 18660.

It is an arithmetic number, because the mean of its divisors is an integer number (8646500).

Almost surely, 2^51465839 is an apocalyptic number.

51465839 is a deficient number, since it is larger than the sum of its proper divisors (413161).

51465839 is an equidigital number, since it uses as much as digits as its factorization.

51465839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3261 (or 3130 counting only the distinct ones).

The product of its digits is 129600, while the sum is 41.

The square root of 51465839 is about 7173.9695427288. The cubic root of 51465839 is about 371.9686618492.

The spelling of 51465839 in words is "fifty-one million, four hundred sixty-five thousand, eight hundred thirty-nine".