51865338 has 16 divisors (see below), whose sum is σ = 118549440. Its totient is φ = 14818656.

The previous prime is 51865313. The next prime is 51865339. The reversal of 51865338 is 83356815.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51865296 and 51865305.

It is not an unprimeable number, because it can be changed into a prime (51865339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617403 + ... + 617486.

It is an arithmetic number, because the mean of its divisors is an integer number (7409340).

Almost surely, 2^51865338 is an apocalyptic number.

51865338 is an abundant number, since it is smaller than the sum of its proper divisors (66684102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51865338 is a wasteful number, since it uses less digits than its factorization.

51865338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234901.

The product of its digits is 86400, while the sum is 39.

The square root of 51865338 is about 7201.7593683766. The cubic root of 51865338 is about 372.9286400922.

It can be divided in two parts, 518 and 65338, that added together give a palindrome (65856).

The spelling of 51865338 in words is "fifty-one million, eight hundred sixty-five thousand, three hundred thirty-eight".