51601228 has 12 divisors (see below), whose sum is σ = 103202512. Its totient is φ = 22114800.

The previous prime is 51601219. The next prime is 51601271. The reversal of 51601228 is 82210615.

51601228 is an admirable number.

It is a super-3 number, since 3×51601228³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 921423 + ... + 921478.

Almost surely, 2^51601228 is an apocalyptic number.

It is an amenable number.

51601228 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.

51601228 is a wasteful number, since it uses less digits than its factorization.

51601228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842912 (or 1842910 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 51601228 is about 7183.3994737868. The cubic root of 51601228 is about 372.2945503103.

The spelling of 51601228 in words is "fifty-one million, six hundred one thousand, two hundred twenty-eight".