51201228 has 24 divisors (see below), whose sum is σ = 128659888. Its totient is φ = 15754176.

The previous prime is 51201223. The next prime is 51201247. The reversal of 51201228 is 82210215.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51201221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163951 + ... + 164262.

Almost surely, 2^51201228 is an apocalyptic number.

It is an amenable number.

51201228 is an abundant number, since it is smaller than the sum of its proper divisors (77458660).

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

51201228 is a wasteful number, since it uses less digits than its factorization.

51201228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328233 (or 328231 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 51201228 is about 7155.5033365935. The cubic root of 51201228 is about 371.3300753481.

The spelling of 51201228 in words is "fifty-one million, two hundred one thousand, two hundred twenty-eight".