51071384 has 96 divisors (see below), whose sum is σ = 123449760. Its totient is φ = 19284480.

The previous prime is 51071381. The next prime is 51071393. The reversal of 51071384 is 48317015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51071381) 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 23 ways as a sum of consecutive naturals, for example, 699572 + ... + 699644.

It is an arithmetic number, because the mean of its divisors is an integer number (1285935).

Almost surely, 2^51071384 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 51071384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61724880).

51071384 is an abundant number, since it is smaller than the sum of its proper divisors (72378376).

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

51071384 is a wasteful number, since it uses less digits than its factorization.

51071384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 51071384 is about 7146.4245605757. The cubic root of 51071384 is about 371.0159175391.

Adding to 51071384 its reverse (48317015), we get a palindrome (99388399).

The spelling of 51071384 in words is "fifty-one million, seventy-one thousand, three hundred eighty-four".