51382868 has 6 divisors (see below), whose sum is σ = 89920026. Its totient is φ = 25691432.

The previous prime is 51382861. The next prime is 51382873. The reversal of 51382868 is 86828315.

It can be written as a sum of positive squares in only one way, i.e., 49815364 + 1567504 = 7058^2 + 1252^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51382861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6422855 + ... + 6422862.

It is an arithmetic number, because the mean of its divisors is an integer number (14986671).

Almost surely, 2^51382868 is an apocalyptic number.

It is an amenable number.

51382868 is a deficient number, since it is larger than the sum of its proper divisors (38537158).

51382868 is a wasteful number, since it uses less digits than its factorization.

51382868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12845721 (or 12845719 counting only the distinct ones).

The product of its digits is 92160, while the sum is 41.

The square root of 51382868 is about 7168.1844284310. The cubic root of 51382868 is about 371.7686637376.

The spelling of 51382868 in words is "fifty-one million, three hundred eighty-two thousand, eight hundred sixty-eight".