51912138 has 8 divisors (see below), whose sum is σ = 103824288. Its totient is φ = 17304044.

The previous prime is 51912097. The next prime is 51912143. The reversal of 51912138 is 83121915.

It is a sphenic number, since it is the product of 3 distinct primes.

51912138 is an admirable 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, 4326006 + ... + 4326017.

It is an arithmetic number, because the mean of its divisors is an integer number (12978036).

Almost surely, 2^51912138 is an apocalyptic number.

51912138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51912138 is a wasteful number, since it uses less digits than its factorization.

51912138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8652028.

The product of its digits is 2160, while the sum is 30.

The square root of 51912138 is about 7205.0078417723. The cubic root of 51912138 is about 373.0407754421.

The spelling of 51912138 in words is "fifty-one million, nine hundred twelve thousand, one hundred thirty-eight".