51719388 has 48 divisors (see below), whose sum is σ = 138754560. Its totient is φ = 14687424.

The previous prime is 51719363. The next prime is 51719401. The reversal of 51719388 is 88391715.

51719388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12753 + ... + 16311.

It is an arithmetic number, because the mean of its divisors is an integer number (2890720).

Almost surely, 2^51719388 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 51719388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69377280).

51719388 is an abundant number, since it is smaller than the sum of its proper divisors (87035172).

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

51719388 is a wasteful number, since it uses less digits than its factorization.

51719388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3746 (or 3744 counting only the distinct ones).

The product of its digits is 60480, while the sum is 42.

The square root of 51719388 is about 7191.6192891448. The cubic root of 51719388 is about 372.5785021403.

The spelling of 51719388 in words is "fifty-one million, seven hundred nineteen thousand, three hundred eighty-eight".