51912870 has 16 divisors (see below), whose sum is σ = 124590960. Its totient is φ = 13843424.

The previous prime is 51912859. The next prime is 51912893. The reversal of 51912870 is 7821915.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 865185 + ... + 865244.

It is an arithmetic number, because the mean of its divisors is an integer number (7786935).

Almost surely, 2^51912870 is an apocalyptic number.

51912870 is an abundant number, since it is smaller than the sum of its proper divisors (72678090).

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

51912870 is a wasteful number, since it uses less digits than its factorization.

51912870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730439.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 51912870 is about 7205.0586395948. The cubic root of 51912870 is about 373.0425288185.

The spelling of 51912870 in words is "fifty-one million, nine hundred twelve thousand, eight hundred seventy".