51994818 has 16 divisors (see below), whose sum is σ = 115544160. Its totient is φ = 17331588.

The previous prime is 51994799. The next prime is 51994829. The reversal of 51994818 is 81849915.

It is a super-3 number, since 3×51994818³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon 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, 481380 + ... + 481487.

It is an arithmetic number, because the mean of its divisors is an integer number (7221510).

Almost surely, 2^51994818 is an apocalyptic number.

51994818 is an abundant number, since it is smaller than the sum of its proper divisors (63549342).

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

51994818 is a wasteful number, since it uses less digits than its factorization.

51994818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962878 (or 962872 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 51994818 is about 7210.7432349238. The cubic root of 51994818 is about 373.2387166334.

The spelling of 51994818 in words is "fifty-one million, nine hundred ninety-four thousand, eight hundred eighteen".