51199428 has 24 divisors (see below), whose sum is σ = 136532032. Its totient is φ = 14628384.

The previous prime is 51199417. The next prime is 51199429. The reversal of 51199428 is 82499115.

51199428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51199429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304675 + ... + 304842.

Almost surely, 2^51199428 is an apocalyptic number.

It is an amenable number.

51199428 is an abundant number, since it is smaller than the sum of its proper divisors (85332604).

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

51199428 is a wasteful number, since it uses less digits than its factorization.

51199428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609531 (or 609529 counting only the distinct ones).

The product of its digits is 25920, while the sum is 39.

The square root of 51199428 is about 7155.3775581726. The cubic root of 51199428 is about 371.3257238772.

The spelling of 51199428 in words is "fifty-one million, one hundred ninety-nine thousand, four hundred twenty-eight".