51918144 has 28 divisors (see below), whose sum is σ = 137367264. Its totient is φ = 17305984.

The previous prime is 51918143. The next prime is 51918161. The reversal of 51918144 is 44181915.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51918143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135012 + ... + 135395.

Almost surely, 2^51918144 is an apocalyptic number.

It is an amenable number.

51918144 is an abundant number, since it is smaller than the sum of its proper divisors (85449120).

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

51918144 is a wasteful number, since it uses less digits than its factorization.

51918144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270422 (or 270412 counting only the distinct ones).

The product of its digits is 5760, while the sum is 33.

The square root of 51918144 is about 7205.4246231572. The cubic root of 51918144 is about 373.0551612652.

The spelling of 51918144 in words is "fifty-one million, nine hundred eighteen thousand, one hundred forty-four".