51210868 has 24 divisors (see below), whose sum is σ = 98166600. Its totient is φ = 23267328.

The previous prime is 51210827. The next prime is 51210883. The reversal of 51210868 is 86801215.

51210868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6615184 + 44595684 = 2572^2 + 6678^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11013 + ... + 14956.

It is an arithmetic number, because the mean of its divisors is an integer number (4090275).

Almost surely, 2^51210868 is an apocalyptic number.

51210868 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

51210868 is a deficient number, since it is larger than the sum of its proper divisors (46955732).

51210868 is a wasteful number, since it uses less digits than its factorization.

51210868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26019 (or 26017 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 51210868 is about 7156.1769122905. The cubic root of 51210868 is about 371.3533781571.

The spelling of 51210868 in words is "fifty-one million, two hundred ten thousand, eight hundred sixty-eight".