51994516 has 12 divisors (see below), whose sum is σ = 103989088. Its totient is φ = 22283352.

The previous prime is 51994511. The next prime is 51994529. The reversal of 51994516 is 61549915.

51994516 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51994511) 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, 928446 + ... + 928501.

Almost surely, 2^51994516 is an apocalyptic number.

It is an amenable number.

51994516 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.

51994516 is a wasteful number, since it uses less digits than its factorization.

51994516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856958 (or 1856956 counting only the distinct ones).

The product of its digits is 48600, while the sum is 40.

The square root of 51994516 is about 7210.7222939176. The cubic root of 51994516 is about 373.2379940081.

The spelling of 51994516 in words is "fifty-one million, nine hundred ninety-four thousand, five hundred sixteen".