51019428 has 96 divisors (see below), whose sum is σ = 131604480. Its totient is φ = 15333120.

The previous prime is 51019399. The next prime is 51019429. The reversal of 51019428 is 82491015.

It is a happy number.

51019428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51019395 and 51019404.

It is not an unprimeable number, because it can be changed into a prime (51019429) 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 31 ways as a sum of consecutive naturals, for example, 573208 + ... + 573296.

It is an arithmetic number, because the mean of its divisors is an integer number (1370880).

Almost surely, 2^51019428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51019428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65802240).

51019428 is an abundant number, since it is smaller than the sum of its proper divisors (80585052).

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

51019428 is a wasteful number, since it uses less digits than its factorization.

51019428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 51019428 is about 7142.7885310990. The cubic root of 51019428 is about 370.8900607350.

The spelling of 51019428 in words is "fifty-one million, nineteen thousand, four hundred twenty-eight".