51019388 has 36 divisors (see below), whose sum is σ = 104617800. Its totient is φ = 21706272.

The previous prime is 51019379. The next prime is 51019399. The reversal of 51019388 is 88391015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28331 + ... + 30077.

It is an arithmetic number, because the mean of its divisors is an integer number (2906050).

Almost surely, 2^51019388 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 51019388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52308900).

51019388 is an abundant number, since it is smaller than the sum of its proper divisors (53598412).

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

51019388 is a wasteful number, since it uses less digits than its factorization.

51019388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914 (or 1905 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 51019388 is about 7142.7857310716. The cubic root of 51019388 is about 370.8899638072.

The spelling of 51019388 in words is "fifty-one million, nineteen thousand, three hundred eighty-eight".