51871868 has 12 divisors (see below), whose sum is σ = 90968640. Its totient is φ = 25880832.

The previous prime is 51871849. The next prime is 51871871. The reversal of 51871868 is 86817815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11621 + ... + 15452.

It is an arithmetic number, because the mean of its divisors is an integer number (7580720).

Almost surely, 2^51871868 is an apocalyptic number.

It is an amenable number.

51871868 is a deficient number, since it is larger than the sum of its proper divisors (39096772).

51871868 is a wasteful number, since it uses less digits than its factorization.

51871868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27556 (or 27554 counting only the distinct ones).

The product of its digits is 107520, while the sum is 44.

The square root of 51871868 is about 7202.2127155479. The cubic root of 51871868 is about 372.9442903763.

The spelling of 51871868 in words is "fifty-one million, eight hundred seventy-one thousand, eight hundred sixty-eight".